S.F.
J.--I believe it is around 2 yrs old that children start having nightmares. My daughter is not quite yet 3 yrs old and since she turned 2 every now and then she would wake up in the middle of the night. Also, I'm sure there is alot of anxiety he feels because of the new baby and this also could be growing pains or a mixture of all. I'm sure it is hard for him to adjust to the new baby since he was the center of your life and I'll bet he doesn't like sharing Mommy. Give it time it will pass.