Did i tear my ACL or what?

i messed up my knee yesterday and my right knee cap goes to the left of my knee a little so it looks deformed. I can walk on it fine and ther is no swelling but when i stand straight my knee cap points to the left. Did i tear my acl, dislocate it, twist it??? i am really scared cause basketball season starts soon. I am going to the doctors tommorow, but i need to know what it is plzzzzzzzzzzz