Pregnant & Depression

I am 22 years old & 35 weeks pregnant. I've suffered from back depression since I was 13. When I got pregnant, my doctor took me off my antidepressants. I have been dealing with it better than I thought I would, until now. I feel so alone all the time, in which I am 98% of the time. I am raising my 2 children by myself (because my boyfriend is never home - needs to get his priorities straight), while moving into a new house and getting everything organized by myself. I'm exhausted, I'm tired, I'm overwhelmed, & I am extremely depressed. I need advice...and I'd love to know how you cope with your depression as well.