Hate my child

FTM to a 4 month old son!!! I hate him! I also have started hating my husband. I really want to leave them and go away, and live all by myself. I had a very traumatic pregnancy and a delivery, resulting in a preemie. I thought it was just baby blues that I can't connect to my son. But I hate and resent my son and husband so much. Because of this pregnancy and now this baby, my career has taken a huge blow. I had other ambitions in life and now I feel like I'm stuck. Is this PPD? (I'm not depressed as such though... I really enjoy my work and love doing everything that doesn't involve being with my husband and son). If this PPD, did it help with therapy? Should I leave? I kind of feel like a baby should not have a parent that hates and resents him so much!