Two years ago I had dental surgery in the bottom 1st molar for a tooth that was cracked below the surface. It was a difficult surgery. Three weeks later, I got a crown. Three days after the crown, I began feeling tension, tightness, slight burning on the left side of my face, across my nose, eyes, and behind my ear. On the right side, I had tinnitus. I've had every test imaginable and am healthy. Is it possible that this is a result of the dental work? If so, how would they find out?