I want to disappear

I have no one to vent to...no shoulders to cry on....no one to tell me God is going to work things out. I'm stressed out. I will be having my new son in 3 weeks. I'm getting hit with drama and obstacles every way I turn. I'm a supervisor and work is stressing me out. I'm a mom of a 7 year old daughter and she is stressing me out. She's bisbehaving at school and not listening at home. My fiancé is complaining nonstop about everything I do. He blows the smallest stuff out of proportion and makes me feel like I don't value him enough. My mom is driving me insane about a late car payment. At this point, I just want to explode. If bit weren't for my daughter I would disappear without a trace. I just want peace. No one has been considerate enough to grant me that wish (peace) since I've been pregnant. I hate feeling this way.