Help!!

Tina

So my son is 3 months. He was sleeping from 10:30pm to 8am every night and then go back to sleep at 9-11 or 12. I was in heaven. He did that since he was a month old. The last two weeks have been hell. He started projectile vomititing so he was awake all night and barley slept through out the day. We found out he has severe acid reflux. We had to cut his feedings down from 4 1/2 oz every 3-4 hours to 2 oz every two hours (auntil they were able to figure out what was going on. Anyways fast forward to now, he’s on meds for it and is taking 3 oz (won’t take more than that) and wants to eat EVERY 2 hours. He only sleeps for maybe 45 minutes at a time. If that. I’ve tried putting rice in his bottles to help keep him full, but he will only take 2 oz with rice and still is hungry in 2 hours. I also give him pedialyte (as instructed by the pediatrician) and it doesn’t make a difference in his feeding schedule. He sleeps great from about 10:30pm- 4am and then back on the every 2 hour feedings. I’m dying over here. And I start my final semester back tomorrow. I’m terrified I’m not going to make it through this semester with these feedings. And I’m pretty sure he’s teething on top of this. Any advice on how to break this two hour feeding? I’ve tried to make him wait longer than two hours but he will scream until you give him the bottle. And he’s already underweight to begin with, on top of loosing weight from the week of vomiting so I want to feed him when he’s hungry but momma can’t get any sleep past 4 am. I’m dying over here 😭🙏