^^^ Do you know if you grinding your teeth at night? It could be your TMJ, just google 'TMJ home exercises' and try a few out. Its really easy. If the pain eases after the exercises, then you know what it could be. But still consult your gp
just finished my first dentist checkup in 10 years and she says all seems fine tooth-wise. she hit my molars with the back of her mirror tool like it was a baseball bat and i owed her 20 large. all fine. sent me to physio who has seem many of these cases. more news as story develops (for future cases out there).