PAIN in left side of face/jaw area. What is going on?! Been to several different dentist. Desperate for an answer.

1 year ago I had a RCT done on #19/ crown placed. Since then that tooth never felt right. To the touch or anything. I can eat on it but I feel it there. I put it off because I don't want the tooth out. I am now experiencing severe pain and ear pain in my left side of face. I've had a CBT scan-doc said nothing wrong. I went to a TMJ specialist- not my TMJ. Had my bite adjusted- did not help a bit. Could this tooth be fractured?! I've always felt a weird aching feeling in it for a year.