The muscles in my face hurt and feel very 'heavy'...i guess you could say. what can i do?

Any Trauma?: Heaviness on the r, l, or both sides of the maxilla can be an indication of sinus infection if you had colds for awhile. Clenching and grinding are parafunctional habits that can cause pain and discomforfort especially to people with unbalanced masticatory muscles/bite . If you don't have upper respiratory infection, see a TMJ dentist. If you have colored nasal discharges and sputum, call your M.D.