that happens to me too, i think it's just an imbalance of liquid in your ears, or you might clench your teeth at night which screws up your jaws.
I asked my orthodontist this exact same question.
------- You are EXACTLY my brand of heroin.
3:57 pm on April 4, 2008 | Joined Oct. 2007 | 115 Days Active Join to learn more about amazingness99Connecticut, United States | StraightFemale | 2685 Posts | 4924 Points