What could be the cause of persistent jaw pain and headache even after RCT of 19 and extraction of 18?

Hi doctor,

I had a root canal done three months ago on tooth number 19. I have not had a crown done yet. I went to a new dentist for tooth pain in that area, and he said he could not help me because the X-rays showed the root canal was not finished. I called my endodontist back, and they said that they had complete the root canal and did not fill one of the roots for post space. My X-rays have been reviewed by an oral surgeon and another endodontist, who concluded that the root canal does not look complete, as one of the roots is not filled with the filling material used. It was also determined that tooth number 18 needed a root canal, and I may lose that tooth. I opted to have tooth number 18 pulled five days ago in hopes of helping the severe tooth, jaw, and ear pain I am having, but It did not work. I still have the pain, and to complicate matters, I now have bone exposure on the tongue side of where my tooth was extracted. I saw the surgeon yesterday, and he filed it down. My headaches are ridiculous, and I worry the infection is spreading to my head. I have had three recent sinus surgeries, and this does not feel the same. I have been on antibiotics for over a week with no relief.

Any suggestions?

Thank you.