my LO has been sleeping through the night since he was 2 months and I mean 7-5/6. It's been great! But this past week he has been waking up earlier and earlier, wanting to be fed. We have upped his food before bed, he's getting a veggie and 8 oz of formula. This morning he woke at 3:15 and wouldn't go back to sleep. We held him off until 4 and gave in and fed him. I don't want to start feeding him at 3. We were doing so good! What happened??