Oh (((hugs))).
I don't have any experience with reflux, sorry.
It is tough when you are tired and wanting sleep. My Little Man WAS like that....he fed every 2 hours round the clock and then stretched to every 2/3 hours round the clock. When you're there in it, it's tiring - but he gradually stretched and stretched his times out, by himself and now does go longer at night (he was even treating us to 12 & 13 hour nights a few wks ago!!!)
Hang in there.