S.S.
Have you seen a dentist? Not to be scarey, but sometimes doctors are not looking at teeth or gums for decayed teeth, absesses or teeth growing somewhere (do you have wisdom teeth?). I just went through a horrible earache not long ago, got antiobiotics, did what I was told and voila, relief with a very dead tooth in the back of my mouth which has since gone to the tooth fairy. Doctors are trained in their specialties, dentists are looking for different things. I didn't even realize how dead my tooth was and like you thought it was related to sinuses, earache, etc. but tooth removed easily and really I haven't had any problems since.Just saw CALLME MR. MOM's post. Looks like a similar problem. Good luck!!!