Welcome deathswing
I am so sorry about what is happening in your life. May I suggest see your physician and see about getting into therapy. You need to deal with your feelings and have a proffessional help you get through this tough time.
It does sound like your wife may be into some problems of her own but most important is you and your child so concentrate on how you can take care of you and do what is best for your daughter.
Again welcome.
Kitt