PPD?

My daughter was born on July 6th, and I had baby blues about 2 weeks afterwards. I feel better in that I don't feel sad all the time anymore. But when I feel sad, it hits hard, not to the point of harming my children, but defintely to the point of thinking of harming myself. I started cutting again. (Something I haven't done since I was 15) I can't control it. My husband and myself have recently hit a rough patch, and I feel like I'm not good enough for anyone anymore, even though he tells me I am, and that he loves me. He just wants me happy again, and I do too, but I have no clue how to be.
I don't know if this is PPD or just depression in general, therefore I have no clue which doctor to see about it. I have no harsh feelings towards either one of my girls, I just feel like I'm not goood enough for them or my husband.
My 6 week appointment got moved from the 15th to the 22nd by my doctor.
I don't know what to do until then.

I'm sorry you're feeling this way, mama. Considering you just gave birth about a month ago, I would say it sounds like PPD. I would definitely recommend talking to your OB. He/she can refer you to a counselor if need be. I wish you the best, hun.