painful lymph nodes in neck

I was diagnosed with fibromyalgia over 10 years ago, when the awareness of it was still new. I am now postmenopausal by two years and am developing more symptoms that the doctors can't identify. The newest symptom started four days ago and hasn't let up at all: intermittent, stabbing pain on the right side under my jaw. I don't feel any inflammation or a nodule or anyting, and neither did my GP. He is sending me for an u/sound of that area.

It stops and starts; goes away for about four minutes and then starts again--it feels like it's being stabbed. The area--right under my jaw--is tender to the touch.

VERY painful. Does anyone else have this? My doc redid blood tests for C reactive protein, ANA, RA, etc., but those results aren't back yet, and I have an appt. with a rheumatologist and endocrinologist in the next 3 weeks. What tests should I ask for??

Three years ago I had a lymph node biopsy and it turned out I have reactive lymph nodes==but this is crazy! I also have Hashimoto's disease.

Thanks for any help!