Is this still postpartum depression?

I'm 9 months pp and I was suffering with PPD shortly after having my baby. It went away quickly I would say because my husband helped me through it, but he left about 2 weeks after our baby was born. I wasn't feeling connected to my baby and I just felt depressed. 9 months later my husband comes back home and I don't feel depressed and I love spending time with my baby, but I have really bad mood swings. Like I tune everyone out, I get really moody, my husband says I get an attitude. It might sound like normal things people go through but I feel as if something is wrong with me. I get really really annoyed with people and end up being in a bad mood and a few moments later I'm fine i act like nothing happened. I feel bipolar. My father suffers from schizophrenia and I don't know if I'm going through the same... you all won't believe how angry I feel and how annoyed I get... please help me I don't know what to do. I don't want to be like this anymore cause it's hurting my marriage and my relationship with my in laws....