Well after last night I am definitely more confident it's OT. With that longer nap, he slept so much better. He woke once at 4am and needed to go pee. Then he went right back to sleep and is still sleeping now (almost 6:30). We had him in bed at 7:30pm and he played and read stories (and took his pants off apparently) until 8:25 when he crawled onto bed and went to sleep. I went and checked on him at 9 to make sure when he fell asleep he was actually on his bed and he is laying with his little makes bum sticking out! So cute!
So....here goes another day!
Thanks girls!