poisonivy

Joseph is as close to a perfect baby as you can get but my only complaint is the second half of the night he is gassy and wiggles and grunts and fusses if I don't hold his pacifier in his mouth. I'm tired! Why is it only between 2 and 6 a.m.? He never really fully wakes up so I think he would sleep great if I could remedy the problem. What do you think is causing this. I'm already watching my diet btw.