Should I give my adopted daughter to child services?

Now before you all write me off as a horrible person, a b****, or anything let me say that I wouldn't be asking this if I weren't desperate. Me and my ex husband adopted my daughter when she was 4 months old. Her mother committed suicide and the father was unknown. I love her so much I mean she's my everything. Me and my ex split when she was 1 and he chose to not be apart of her life. He pays child support but he lives several states away and hasn't seen her in 4 years. Its just me and her. My mother died 2 years ago and she was the only family I had so its just the two of us. I've always been "different." I have my good days and my bad days. Sometimes I want to drive my car off a cliff and other times I just want to bake cookies. One minute I cry, the next I want to dance. I've been this way since I was little and thought maybe I'm just "different." After my husband left, my eccentricities starting multiplying. I started seeing colors that weren't there, hearing voices that don't exist and feeling drained everyday even after waking up. I kept it under some control for about a year but it only got worse. I didn't want to tell anyone in fear of losing my daughter, the only good thing I have left. I prayed and prayed but I didn't get better. I starting sleeping all the time, missing more and more work, and acting more and more strange. One day I thought I could fly and tried to jump out of my 2nd story window (thank God for the neighbors). My daughter started becoming afraid of me. She would hide from me in the house. I eventually lost my job and we had to live off unemployment. We lost the house and had to move into a pretty bad neighborhood. She would beg me to make her some food or tuck her in at night but during me "episodes" I didn't care her, myself, anything. I've thrown things, broken glass, brought strange men to our home and my daughter has had to witness it all. I know I'm a bad mother and I can never change what has happened. The teachers at her pre school started getting suspicious and I knew I couldn't keep this a secret anymore so I finally went to a doctor 6 months ago. He diagnosed me with a serious mental illness. I've been prescribed a dozen different things but the only thing that really works for me is the one med that makes me very nauseous. Nothing else has really changed. Some days are okay like today, others are not okay like 3 days ago or possibly tomorrow or the next day, or the next. I can barely take care of myself much less my daughter. I've begged my ex to take her but he always says "your baby your problem" and says he's ready to terminate his parental rights if she gets taken. She knows that she didn't come from me (I've shown her pictures of her birth mom) and I'm worried what will happen to her without me. But I also worry what will happen to her with me. I told the school the truth and now we have a case worker that visits every week and she always says "if its too much, we can find her a nice home." I'm at the point where I'm almost sure I've never get better. My daughter would be much better off with pretty much anyone but me. I can't be her mom right now but I don't want her to hate herself when she's older. I don't know what to do.