How do you file for a fast, easy, cheap divorce and not go through another major breakdown ?

My husband just left with the kids.  Thank goodness.  I was having a great day until he came home from work.  He calls me on his breaks to look good in front of his guy friends at work.  When he gets home his true self comes out.  He knows that I can not work now due to a major breakdown back in March.  I am still having bouts of depression and panic attacks.  I just had a panic attack right now.  I took a Lorazapem and I am hoping that I feel better soon.  The pain in my left arm and chest.  Each time the pain in my arm and chest make me feel like I am having a heart attack.  My youngest daughter was not listening to me today.  She thinks that she can control me and get her way.  My husband doesn't always back me up on the discipline.  He says that if his grandma were alive, things would be different with her.  My stepdaughter thinks that she can ignore me the whole day, leave to be with her mom, and then treat me like crap on the way out the door.  This Wednesday, in 2 days, is going to be the first time in 13 years that I have not started teaching.  This is just killing me.  On top of it, I have to have major surgery on September 10.  I literally feal like I am dying.  I am soooo upset.  I am taking Prozac and Lorazepam.  I haven't taken meds for depression as faithfully as I have this time.  However, not getting the support from my family and being emotionally and verbally abused many times during the day, everyday is just killing me.  If I file for divorce, I will loose my house.  I picked out this house.  If I stay here I will loose my mind and possibly die from hypertension or a heart attack.  I am so confused, so upset.  What am I going to do?  I don't know where to go or what to do.  My friend said come and stay with her.  I don't want to stay at my parents house because that is where all the physical and emotional abuse happened when I was staying there.  Even though my mom calls it the safe house now, that house will never be safe to me.  My brothers live in Appleton.  My sister is bipolar and that is just too much for me.  She  is also just back together with her boyfriend.  So what do I do when I am not working, on disability, going to have surgery, and not going back to my life long dream.  Suicide is out of the question.  I tried that a long, long time ago.  That would only end in having me committed.  I am staying for both of my daughters.  I feel that I married the wrong man.  How do I leave him?  I don't know if I could survive on my own.  I am too dependent on someone.  I miss the man that I once loved.  I don't think that man will ever come back to me.