Hi. 2 month old baby seems uncomfortable when he sleeps. After feeding and burping, I would lay him down to sleep. He would be find for a couple minutes, but then he would start squirming and moaning, eventually waking himself up. What can be the problem? I have tried swaddling him, but he keeps on grunting and squirming. He sleeps fine during the day, it seems only during the night that he is like this