I used to get the same. I was able to help it by getting in the habit of stretching my jaw often, and shifting my neutral jaw "posture". The neutral state used to be me keeping my jaw closed, meaning bringing my teeth together (not tight enough to clench, but just enough for contact), but I retrained myself to let my jaw "hang" when in a neutral state. It's helped a lot with tinnitus, ear pressure, jaw pain, etc.
May I ask how you managed to retrain yourself? I have tinnitus for a year now, plus issues with clenching my jaw, but I have yet to find a good way to stop doing it.
