Connection fear

I'm going to have my baby on the 31st March and I am feeling overwhelmed about everything. I feel like nothing is getting done especially with my 2year old making everything slower. I fear going in the baby room just makes me feel horrible. I'm always crying. I can't afford to get depressed and to have my bipolar play up which I think is already happening because I'm in a depressed cycle already. I'm thinking about self harming just because I need to find a way to cope and I don't know what else to do I don't have anyone here other than my partner I can really rely on and he is working all the time, I just feel very alone. Does this easier? Will a connection come for me at all.