Random numb feeling in cheek and jaw (right side) tight neck muscles, anxiety, stress something else?

TMJ-TMD . TMJ disorder is the second most frequent cause of orofacial pain after dental pain. The common symptom are: headache, jaw pain, neck pain, eye pain, earache. Proper diagnosis is the key for the successful treatment. This disorder will not resolve on its own with home care. Rec.: orofacial pain specialist for evaluation and treatment. .
A lot of things. Your symptoms may be related to stress but numbness needs to be fully evaluated as it may be early signs of something serious. You should see an oral ; maxillofacial surgeon to determine what is going on and make a definitive diagnosis or referral.