Got pregnant on Depo shot!

I am beyond upset. A little bit about me: I'm 38 y.o, I'm obese, had my whole thyroid removed last December so I'm in the process of trying to get my hormones squared away, I've been in recovery for 21 months which includes being on some medications for depression, bipolar, etc. I have 4 kids from2 previous marriages all of which I see none of them due to court orders. I'm trying to get my life in order again but I just found out I'm pregnant and I'm on Depo Provera. So how's that gunna screw things up? Me and my bf live apart. Me, at my parents and he is a manager at a sober living. I am in NO way ready for this emotionally, physically or mentally!!!! Help!