I get that occassionally as well. I had one doctor tell me that it was TMJ, triggered by stress. When the stress is alleviated, symptoms do get better for me. Nothing else really worked. I hope you feel better soon.
PCP pretty convinced- Lupus , Taking plaquenil,Propranolol, Flexeril,Claritin, Zantac,Ambien,vitamin B-12, multi- vitamin, Lortab. Prednisone 15mg daily added 03/09. Mom of 2 boys 1 and 6. Symptoms: Fatigue, joint pain, heat/sun sensitivity, mouth and nose sores, malar rash, migranes, awful hives, positive ANA, and RF.