Baby losing weight

I don't understand how this happened. When I was with the midwives, they said he was gaining 33 grams a day and always said he's doing great. I feed him constantly, like every hour and a half. Sometimes he's feeding for so long that he just starts spitting it all up. I almost exclusively breastfeed, for context.

I start going to my doctor and he says he's not gaining enough weight and to breastfeed more. So that turned into me and my kid living on my couch and non stop breastfeeding and he gained an entire pound in a week. Great!

I still breastfeed a lot but have appointments. Massage for my messed up body, pelvic floor physiotherapy for my messed up pelvis, chiropractor also for my messed up body, craniosacral therapy for my son who came out all twisted, and the doctor who keeps making me come back to weigh him. There's times where I need to go out or sleep. I leave bottles but my help half the time doesn't feed him because he doesn't seem hungry. I end up having to direct people to feed him or feed him myself. His sleep is inconsistent and he seems to only sleep properly with me. It's a lot of pressure on me and it seems like sleeping, appointments and showering are the only breaks I get. Or baby wearing on a walk because he falls asleep.

I go in to weigh him yesterday and he's lost 5 ounces. I'm in shock. I order my own scale because I don't believe it. It's true. I just don't understand. He lost weight because I had to leave him sometimes for an hour or two?? And people didn't bother giving him a bottle? Because I sleep and let him sleep? So I have to sacrifice my sleep and health to feed my child? I don't want to switch to formula, everything's already so expensive. When I pump, I get up to 8 ounces so I don't have a supply issue.

My husband thinks it's because he keeps growing in length and is insanely active. The doctor doesn't care. He gives me crap over everything. Breastfeed more! Sleep more! Get more you time! Do shifts! He told me to have a day a week to get out for EIGHT HOURS and also told me I should have eight hours straight of sleep. Yet I should breastfeed more and he kept calling me and trying to wake me up today to talk about my son's weight and the "expectations and goals". Funny.

I'm so tired. Nothing I do is enough. I dedicate my whole life to this child and even that isn't being done right. Why can't I do anything right.