My 2 yr old son wokes up at midnight and indicate by hand that his leg is paining so just do massage. He is twin baby conceived by iui. Both the baby delivered in healthy condition. No birth defect. But still feel like is he having any problem. Because he is less active then my girl baby.. She started to crawl walk and talk fast than my son. He get scared very easily. He don't get mingle with other easily. I feel sometime he is very lean. Is this things normal.