Pain under left jaw esp when pressed, achy feeling. Trouble swallowing recently happening No tooth pain, no wisdom teeth, can this be tooth related?

See a dentist. If you are experiencing pain, swollen lymph nodes, trouble swallowing and it does not go away or if you find it difficult to open your mouth, you should see a dentist for evaluation, x-ray and treatment. .
Yes. Yes, can be dental disease or other problems. See an oral surgeon or ENT doc for examination.