My son had DTap, Polio, Chicken Pox, and MMR Vaccines now can barely move?

My son just got his vaccines today for his four year old check up. He got DTap, Polio, Chicken Pox, and MMR Vaccines. But since he got home from the doctor’s, he has been complaining about his thighs and legs hurting. He walks around limping and can barely move. What can I do to help him? Should I take him to the hospital?