PPD help

Hello, I’m a stay at home mom with my 15 month old and a 3 week old. I’m having symptoms of postpartum depression, I mentioned it to my ob when I went for him to check my c section incision. He told me to just go with out the kids for an hour or two a day. We currently live with my in laws due to my husband losing his job because of COVID-19. Sometimes I get so angry at the littlest things. I feel like I’m not enough for my kids. I just feel suffocated living here. I feel like I can’t do as much as I should be able to. My mil is always talking shit about me to other people. Or just in general about my “ bad parenting “ I tell my husband but he doesn’t say anything to her. I’m already feeling like a shitty person I don’t need more bs. I love both of my kids but sometimes I just feel like it’s so much I can’t do it. Most of the time I feel like everything is falling apart and I can’t do anything about it. Should I just wait for my 6 week appointment with my ob to tell him I’m gonna need maybe help from a therapist or something?