How long did acid reflux last with your baby?

So my 8 week baby started to show symptoms for a week. So far we had the occasional projectile vomit, regurgitation, choking while feeding. He is exclusively bottle feed.

I understand is normal since the sfincter is not developed, it depends on the baby and as long as baby is taking weight is normal.

But seeing him struggle breaks my heart. Sometimes he wants to eat more but after eating a lot in one sitting I think his food is coming back and he starts to be fussy, choke or cry. I have to pull the bottle and he cries because he wants to eat but he can't.

I am doingg my best, his crib is inclined we do mid burps and I hold him up right after and during feeding. One feeding takes an hour and he likes frequent feedings, it is really exhausting.