Well, it sounds like you are experiencing tmj symptoms. The best way to know is go visit your dentist. Tell them your symptoms and ask them if it is. (It mostly likely it is). With a proper diagnoses you will be able to go to a tmj specialist who hopefully will examine you further and be able to treat you properly. Are you in pain? Are you having trouble with your opening of your mouth? Look under Marlene's post of symptoms and kind of see how many of those you have. You might not get that many and that is okay. But in my experience you can think you are fine and then you can wake up one day and you are ten times worse, so don't ignore your symptoms most likely they will NOT go away.