blah day blah mood

I had a great end to last week. I ran at 5am Friday morning. I felt great all day! I didn't even have a drink Friday night- I had a great time with my kids. The weekend was wonderful. I controlled my alcohol intake and overall ate decently.
I woke up yesterday with a super stuffy head. The only thing I wanted to do was stay in bed all day. As soon as I got home from work, I played with my kids for a little bit, then when my husband got home (late) from work, I retired to my bed and passed out by 9.
There was no way I was running this morning. I feel like I have a sinus infection and today I've been eating comfort foods. I want to crawl into bed.
I feel guilty because today is my sons 8th birthday. I did manage to pull him out of bed EARLY this AM before I went to work and give him the traditional bowl of ice cream for breakfast on your birthday and sing to him, but I have no energy and I want to do something fun for him tonight. I just want to crawl into bed. Maybe it's the crappy weather too?!?
I feel down on myself because I haven't exercised since Friday. I want to pull myself out of bed in the morning no matter how I feel and run. Right now I have no motivation other than I don't like how I feel right now and I know only I can change that.
Sorry I'm rambling and complaining. I have so much to be thankful for, just feeling blah.....