Recently couldn't quit shaking. Lasted for several minutes, also couldn't open my eyes or speak. My teeth chattered and I bit my tongue. Seizure or no?

POSSIBLY. Could have been a seizure or syncopal episode (fainting). Patients who experience a drop in blood pressure, usually in response to stress or a rapid change in position, can have the symptoms you describe. See your doctor to rule out more severe causes--especially if it was a mild, grand-mal siezure of epilepsy.