My son is 6 months and he was sleeping great, 8hrs without waking up. Now however he is waking a minimum of 4x a night and i don't understand why. I read it could be teething pain his 2 bottom teeth have already come through and he didnt/doesn't seem to be in any pain from it and it doesn't seem to be bothering him. So other than the teething what else could it be? I'm sooooo tired