Well, I met with the Endodontist who barely examined me (he didn't look at the tooth directly) and told me the tooth looked good based off the xray from my regular dentist. I now wish I had kept a copy of that xray to post here. He stated that all teeth penetrate the sinus cavities in that manner. This one was well into the sinus, not near it, but actually in it. However, it has been close to 2 months, I still have the same toothache/headache and general pain in that are of my mouth (behind the tooth in the gums). I just feel at my wits end here. If I have the tooth removed because I "feel" like it needs to be but it doesn't correct the issues, what then? I wonder if when tooth #2 was removed my sinus cavity was perforated causing an opening to remain untreated. Could that be the cause of this? If so would an ENT specialist be capable of repairing it after so much time has passed (12 years)?