My 3 year old daughter is hyperactive and she suddenly start shaking her head and body in pace while playing. My husband and I are working and doesn't give her much time. Is it a cause of concern? I get very scared seeing her doing this. Otherwise she is very playful and active. She catches very quickly but slow in speaking. She knows all the rhymes and I can see she relates whatever she see in the TV on her real life. She grasps very quickly and can copy all dance steps, action and even conversations when observing. Should I consult a doctor?