anyone else feel lost after giving birth?

FTM and I have a week old beautiful girl, but for the past 3 nights she has been fussy and crying a lot, I thought she was in pain and I was about to take her to the hospital but my husband calmed me down and said it wasn't necessary. He has been great throughout this whole ordeal, he's very hands on. I'm Mexican and he's Caucasian, so a lot of my beliefs on child care are different from what he's been reading, and he researches everything because he's never been around newborns so I try to compromise and do stuff both ways, but I've been feeling depressed, like I'm not a good mom, I'm not producing milk and my mom and my sister keep telling me to do things a certain way, I went to buy tea and those lactation cookies ($25 a bag) and when my husband told them how much they were it was like I was the stupidest person in the world because we spent money on that. We tell them she's been fussy and they ask me why I didn't do the olive oil thing as if I was dumb for not doing it. Then my mom gets mad at me because I'm walking around barefoot, but my feet are extremely swollen and don't feel like wearing my slippers, according to her I'm not supposed to cook, go outside for too long, and I have to be covered up because that's how Mexican women do postpartum. I hear my daughter crying and I feel like I fail her every single time, I don't feel good enough to be a mom anymore, even though it's what I've always wanted, because I was told I couldn't have kids. I just don't know what to do, I know it's all in my head, but at this point I'm freaking out thinking about my husband going back to work and then he leaves for a week to do some training out of State (army). Him leaving isn't new to me, been through multiple deployments but I guess it's freaking me out because he's been such a great help and I really don't want my mom and sister to be around when he's gone, I know they'll help out tremendously, but they're also going to criticize how i do things