Have tight/pressure feeling left jaw/cheek. sometimes around eye/temple. dentist felt & said jaw muscles tight. had for 3.5 weeks. sound like muscles? pcp thinks could be sinuses. have anxiety & really worrying about it. thoughts on possible issues??

Pressure: If you're concerned seek a second, third, forth opinion until you have satisfactory answer. Have you tried warm compresses to relax the "tight muscles?" Have you tried an analgesic or a muscle relaxant? Have you had a medical work-up to asses your sinuses? If your anxious, be proactive.

Consult oral surgeon: Do you smoke or chew tobacco? You need a proper & thorough evaluation of Muscles & TMJ. There are several conditions can lead to these problems. Teeth, Muscles of mastication & temporomandibular Joint work in harmonious relation. So, the Teeth, muscles & TMJ should be evaluated. Other pathologies need to be ruled out too.