For the last two weeks, minus two great nights, DS has been waking at 3 or 4am and will not go back to sleep! I don't know what to do. We thought he was having bad gas and he's had mushy poop or diarrhea later in the morning, but he's happy as a clam if we let him play on the floor and/or watch TV. He's also been spitting up which he didn't really do much before, maybe just small amounts. Lately, it's increased in volume sometimes big volume. I'm still nursing, but he gets mostly formula now for the last couple of months. Thought maybe teething too, but giving Tylenol does nothing. He rubs his eyes like he's tired and wants to sleep, but screams at us if we try to put him down. I really don't know what to do.