I just dislocated my knee HELP!?

okay in 14 and a boy (6ft. and about 150lbs. if that makes any difference) and about an hour and a half ago i was in at the movies and my dad wanted me to switch seats with my little brother so i tried to sqweez through the row and i went to sit down and my foot didn't move with the rest of my body and my knee cap moved to the right of the socket it was obviously dislocated because the knee cap was almost to the side of my leg in a panic i stood up and then feel to the ground so i put all the weight on my other leg but as soon as i straightened out the dislocated leg it went back in to place i went in the hall area of the theater with my dad my leg hurt alot but he got me some ice and we went home i haven't put any pressure on it and ive been icing it ever since and the pain has gone down a lot do still have to see a doctor?