Husband and I have been very lucky. Our son has started sleeping through the night since he was around 1 month old sometimes sleeping 10 hrs. But now that he's turned 2 months for the past 4 days he's been waking up at 3 am hungry and falls asleep. Does anyone happen to know why? He eats the same maybe a little bit more than normal..How do I get him to back to his normal routine sleep?