I don't know what to do...

First off, just a fair warning to anyone on here who might read this: Although I do feel like I need help and guidance, I really can't go into detail about whats going on. All I can say is, it's really really bad. To the point where I might have to make multiple visits to the doctor, run a number of tests and get myself thoroughly checked out.
I'll try to sensor myself as best as possible here. I've been irresponsible and made a number of stupid, careless decisions lately which could seriously impact my health. Lately I've really been thinking over how the past two months have been, and for the most part things have been going really well. I've been eating better, exercising more, dating this amazing woman again and looking like crazy for a new job.
Don't get me wrong, for the most part things are definitely looking up! I'm doing everything I can to pursue a happier, healthier life because I finally feel like I deserve it... But over the past two months, a number of really bad things have happened. Stuff that, ordinarily I would not have just ignored but considering the circumstances I chose to just let these things slide. I've addressed them of course, but I kind of just let the matter go. Last week however, I had one really bad day. Work made me feel really shitty (and this is a job I used to really enjoy), the guy who interview me for a job was two hours late and called instead of meeting me and, without going into detail, the night went horribly wrong and I didn't get any sleep until the following night.
Because of that, I needed some alone time to really think things through. Really consider what's been going on in my life. Recent events have made me recall advice my mom gave me WAY back when I was only about 7. At the time, I kind of ignored it, thinking I'd never need that kind of advice but now more than ever I wish I had some real guidance here. I'm kind of trapped, just following my own gut instinct and trying to be as reasonable as possible about the situation.
I've been afraid to ask anyone for advice, including my friends and family who have been through something similar because I already know what they'll all say! It's been tearing my apart over this past weekend because to follow their advice really REALLY feels wrong to me, particularly in this case.. But they're all right! This is getting to be way too much for me to handle. This is becoming a major threat to my health and I really don't know what to do. For the time being, I'm not really in any physical danger, haven't noticed anything alarming and I've at least been trying to take care of myself.
I keep reminding myself of the uniqueness of this situation. Reminding myself to follow my hearth, even if it means going against my better judgement. I'm already too involved in this to back out, even if it's for my own health and well-being. No one's forcing me to be involved, but this is also something that I can't easily disentangle myself from either. Even if I tried, I'd just be pulled back into it.
Although I can't go into detail about what happened to make me seek more alone time, I can say that it was a really strong and rather scary wake-up call about what I've gotten myself mixed up in. It wasn't just that one night that did it either, since then new details have surfaced that make this even scarier for me.
I've been lied to by someone I would normally trust with my life about something pretty serious and potentially extremely harmful. There have only been a few, rare moments when I really had to ask myself if I should be involved and usually in the past, even if it seemed against my better judgement at the time I chose to trust this person and it's always turned out ok... but considering what this person has said to me so far, I really should have been more cautious and made my concerns a lot clearer. I chose love and trust over caution almost every time and in the past it turned out to be the right choice... until now.
I even consulted a psychic (and I probably will again before I confront my "friend" about this), just because I was so lost about whether or not I was doing the right thing. She basically said yeah, I'm doing the right thing and following my heart and this pursuit this time really is the right path to take... but she doesn't know all the details. She doesn't know how dangerous this situation has become. Several times I've put my own health at risk, and it seems like the more I learn about what's going on, the more I realize just how many careless risks I've taken without even knowing.
Of course, I will do everything I can to treat this as gently and with as much love as possible. I realize that there will be times when I'll have to force myself to take some alone time and it seems like as things develop I'll have to do this more and more and I know this is going to be pretty damaging to myself and those I truly care about.
The weird thing is, I can still remember when my mom warned me that something like this might happen. This was WAY back when I was just a little child and couldn't even imagine how this sort of thing could ever happen. It's quite likely that things are just going to keep getting worse, A LOT worse before they get better. Feelings are going to get hurt, important relationship will be damaged... This is going to happen no matter what I do at this point. As I said, I'm already too deep into this to really get myself out of it.
What disturbs me even more is, my life was finally changing for he better! Things were, and to some degree continue improving. But now, even at best I know that what's going on is going to effect me negatively... Eventually to the point where it might become physically noticeable both to myself and those around me. I've been wracking my brains the past week or so trying to decide what to do. Trying to consider all angle to see if there's anything I could do. Physically I'm already doing the right thing. I'm trying to take really good care of myself now. As far as my involvement goes though, it doesn't feel like there's any steps I could take without causing harm to either myself, someone I love, or seriously damaging relationships I value.
This site seems to be dead for the most part, no one's really here anymore so I don't feel as awkward about being this incredibly vague. I do need help, and I do need advice but because of the situation it's really for the best that I don't go into detail about what's going on. Because of this, I can't ask any of you for advice and I can't expect any of you to have anything to contribute with so little information to go on.
I never ask this, and ordinarily I would never ask this but please pray for me! I hate to say it, but that's really all any of you can do. I'm not even religious, and I don't really care what religion you follow. I really do need some guidance here and there really isn't anyone I feel comfortable going to about this.