My 14 month old is very rebellious. If we tell him not to do something and remove him from that area, he throws a fit!! He will bite his hand very hard and hit his head on the floor. Is that normal?? If we tell him to stop, he will, but will then start crying. Also, he will do the same thing if he gets really excited and cant control his excitment. Does this mean there is a bigger problem going on??