I'm not sure what's going on with my son (14m)the last two nights he's woken up in the middle of the night screaming and he sounds like he's in pain. The first night I woke up with him,rocked him back to sleep & he was fine. last night he kept waking up several times screaming but he was still asleep so I don't go in there until early this morning when he start moving around a lot more. Has anybody else experienced this or think they may know what's going on? He's ususally a great sleeper.