{{HUGS}} it's hard to get things sorted when they are so tiny and you have reflux in the mix too. How much does he weigh and what dose of zantac is he on - how long has he been on it?
Can you put your whole EASY down, including the times he sleeps, you could be missing sleep windows which is why he can't/ won't settle.
So:
Eat - what times, how long for
Activity - how long for
Sleep - what times, how long for
Laura