I worried I'm going to hurt my baby...

I'm over 6 months pp, I've been on two different kind of antidepressants and if anything they've both made me worse. Every time my baby cries which is a lot I just get so angry and stressed to the point I feel like hurting him, I've went back to my doctors and told them my new antidepressants are making my mood worse and they just told me that it takes a while for them to work. I can't go on any longer like this, I iust want to run away and never return. I've been on my new antidepressants for over a month now, what am I meant to do. I'm not getting the help I need, I see a different doctor every time and they are all saying the same that it can take a while. I'm worried for both my own and child's mental health.