For the last year and a half, I chalked it up to growing pains.
A month ago, he woke up about 4 nights in a row, just crying in pain and it seemed to always be the same leg.
Today we went to the pediatrician, she thinks it is growing pains as well, but just to be sure we had to have x-rays.
Now, I will worry until the results are back.
BTW. I received very positive feedback from my interview on Monday. Turns out the person who I really didn't think liked me apparently really did.