I can't say that I know exactly what you're going through.  But having bipolar and being in a 10 year relationship has certainly given me some knowledge of how you must feel.  I had a pretty good life up until my very first episode.  I had a career of five years which I absolutely loved.  After being stressed out due to my relationship and stress from work, I ended up having numerous episodes.  I finally lost my career.  I was forced to take on jobs that I did not like.  There were months when I had no job.  Because I had no job I was forced to put my house on the market and move back in with my parents, along with my eight year-old daughter.  I ended my relationship with my ex and started going to church on a regular basis.  I gave God a lot more time than I normally did.  God worked wonders in my life.  It wasn't long before he blessed me with income to pay for my expensive home, car and other necessities.  My daughter and I moved back home and I met a wonderful man.  We plan to get married next July.  I know it seems like it's the end of the world right now.  But trust me God knows what you're going through.  My favorite scripture goes something like this "All things work together for good for those who love God and are called according to his purpose."  To answer your question, pray continuously.  God has a plan.  Just trust him.  Don't give up.  As far as your marriage is concerned, it may still be salvageable if that's what you want.  Put it in God's hand.  He works wonders.  Sorry to talk about God so much but he's proven himself to me too many times to just not mention him.  In this situation, you should consult God.  Please don't be offended if you already are praying.  It's just that it took me months to receive the blessings that I've mentioned.  Sometimes God puts us through tests.