My 9 month old has been sleeping 12 hours for well over a month now and all of a sudden he's uP for a feed in the night. The last three nights he's woke at 1am or so for a full bottle. Today he woke at 2am and now again at 6am. He usually sleeps from 8-8. My eyes are burning I'm so tired. Is this a regression of some sort? I hope it stops.