Needing advice please..

I just had my LO (little one) Dec. 10th via C section. For me this has been one of the hardest things I've gone through recovery wise. However, I am struggling bad with anxiety and depression. While I was in the hospital my doctor increased my anxiety medication to help post partum depression. Honestly a I believe I have Ppd its definitely more than just the "baby blues". I feel like im not doing enough or good enough as her mommy. Every time she screams it breaks my heart bc she's in pain. Since she's gotten home she's been gassy and struggling to poop. My fiance also is helping but makes comments that make me feel like im always doing the wrong thing. This is his 5th baby so he does know what he's doing but sometimes his comments hurt. Like this morning I was struggling with her diaper and he says something along the lines of you don't even know how to put a diaper on and whats taking so long or he will just be like I give up. He'll make sly comments throughout the day and honestly it makes me feel like im a crappy mom.. I am so emotional and hormonal that I break down everysingle day bc im worried im not good enough as a momma. Im hardly eating ot drinking anything.Honestly I think im developing or have developed ppd. I never once think about hurting her or doing anything to myself but there have been times each day when I believe they would be way better off without me. I love my LO (little one) so much I just hate feeling like this.