Afraid

Okay so I'm 24 weeks pregnant. And for about 2 months now I've been in a deep depression. The only thing keeping my mind steady is this baby and my job. But recently I've went back to my old ways of self harm and even more so I've began blaming this baby for all my problems! As I know none of this is healthy especially for the baby. Now I'm terrified I'm going to go into a deep postpartum depression once he gets here so please I need some advice if you have any!