Depression

I’m currently in therapy for PPA but struggling now with depression also I just get so upset every day feeling like a bad mum and like I’m not managing as well as other people seem to be. I just keep breaking down and now starting to have episodes of rage where I just want to hit and punch and throw (obviously not harming baby) but just in general so much frustration and anger. I don’t know what to do or how I can feel better my therapist suggested I try medications but I’m breastfeeding and too scared to harm my baby with tablets