Could it be the pillow, or arthritis? i have mild base of head/neck pain that gives sporadic mild sensation of poor circulation, pressure in one ear, jaw clicks same side as ear, have tmj same side, neck cracks, mild sporadic headaches in temples?

Could be either, Your body is talking to you. Listen and take good notes and share with your health care team. You all will figure it out and get the right treatment.

Please go and see your dentist and ask for an evaluation of your jaw and muscles. This would be a good place to start this investigation. You can look up jaw exercises here, they may prove to be helpful: https://drneilmcleod.com/information-sheets/