Needing advice mommas

We had our 1 month appointment today and I wanted to talk to her about baby girl having acid reflux. She basically projectile vomits after every feeding, I’ll feed her for 30-45 minutes and he’s still act ravenous like she hasn’t had enough to eat and like she’s uncomfortable. Can’t lay her down even an hour after eating because she’ll throw up and she hates being on her back and even sometimes on her side. So I bring it up to her and she says that I just need to feed her in an upright position and keep her upright after feeding for 30 minutes. I already do that and it hasn’t helped. She already doesn’t sleep at night unless she’s held. We tried to start bed sharing because literally nothing else would work and then I got mastitis and my fever was way too high to be so close to her without her over heating. My fever is gone now, but I’m having crazy night sweats that started the night my fever broke (I’m talking soaking wet like a just took a shower,disgusting I know ) so she still can’t sleep with me. I was really thinking that the reason she wouldn’t sleep in the crib or bassinet was because it made her uncomfortable due to reflux but she doesn’t seem to agree with me so idk🤷🏼‍♀️

Then about the weight gain. Baby girl is EBF was born at 6.10oz 19.5 inches dropped down to 6.3oz and was back up to birth weight within a week. She was weighed two weeks ago at 2 weeks old and she was 7.9oz today we went in at 4 weeks and she’s 8.9oz 21.5 inches. She told me that a pound a week is a lot and that she should only be feeding 10 maybe 15 minutes on each side because she’s gaining a lot fast and this is what’s causing her to spit up/vomit so much bc I’m over feeding her. Isn’t about an oz a day normal for babies this age? Shouldn’t babies this young decide how much they need? I’ve always over heard that a breast fed baby won’t over it? If I take her off before she takes herself off she screams like she’s starving and nothing else will soothe her. Then I put her back on the boob let her finish and she goes to sleep and is good for 2-3 hours usually.. How are your babies gaining weight? What was their birth weight/ height and what is it know and how are they fed? Just wanting others opinions. Thank you!