Sleep Deprivation

HELP! For the last two nights my little man has been sleeping awful! He was my best crib baby. He has slept through the night since he was 4 months old. He is now 2 and I feel like I have a newborn again. I update my blog with him in my arms trying to go to sleep. This is completely unusual for him. He was never a snuggler, always independent and curious. Now he lays here, part of me loving it and another part just a little bit annoyed. Isn't this how motherhood goes? Just when you think you have them figured out they surprise you.