So, you've tried to stay faithful, but the stress has finally gotten to you.  You feel weepy, angry, anti-social, or maybe you don't care any more - about anything. 

What do you do now?

I suggest you go back and try all the suggestions I listed for what to do when you're stretched too far.  Whether a friend died, your kids are going away to college for the first time, or you are just overwhelmed by life itself, drawing closer to God never hurts. At its worst, it seems ineffective.  But, as I think I said before, it's not.  What your feelings and thoughts tell you is not always the truth. We may not know the truth until we're on the other side of this dark cloud.  In the meantime, it feel horrible.  I don't doubt that for a moment.  Feelings are real and intense, no matter what they're based on. 

My second suggestion is if you truly think this is depression and not just a bad day, check out this website:  ChristianAnswers.Net.  It has some helpful links and Bible verses to help you get through the bluest day.

Thirdly, I strongly recommend that you seek a Christian counselor who can help you reason through the depression while drawing closer to God.  A counselor who shares your love for the Lord will help you see a way out of the valleys of the shadows of death.  You may need medication.  Be sure a physician has thoroughly examined you and asked lots of questions.  If you do turn to medication, I still strongly suggest you see a counselor as well.  If you get counseling, you may be less likely to be depressed in the future.  You may also see the light of life sooner than if you had simply taken medication.