Swelling under ear. Sinus infection.

I have jaw pain and swelling under the right ear near the lower end jaw. Exactly under the ear. It's very tender to touch. It's been there for more than 2 weeks. I had facial pain and pressure. I have nose and ear congestion. Dr diagnosed sinus infection and Otitis media.Prescribed  amoxicillin antibiotics, indomethacin NSAIDs.Finished the prescribed medicine for a week. I still have the swelling and jaw pain. I also have sinus pain. I feel the pain in the face, upper jaw, ears when I bend down. this is the first time I have swelling under the ears near the jaw along with my sinus and ear pain.  Whether it could be any tooth issue? still have nose and ear congestion. taking Zyrtec and Flonase drops everyday. ear pain still there along with swelling. it's like scratchy sore pain inside the ear and in the lower jaw. (under the ear). it's throughout the day. is it swollen lymph nodes or any tooth issue? I don't want to go to different specialist at this current pandemic. pls help.