Donna,
As inexperienced as I am in this matter, I agree with Brian. I think seeing another doctor would be the way to go.
My PET scan showed something in my chest near my heart. My ENT said that the heart always "lights up" in the scan. Said that I was due for a chest xray when I turn 40 (1 year from now). Said we'd wait and see if it's still there at that time. The spot was described as non-specific. As relieved as I was to know that I did not have oral cancer, I was still concerned about my chest. I saw my GP, gave him all my results and we are doing a CT scan of my chest today.
I would like to believe that we can trust all doctors; but, we must remember that they are human. A second opinion wouldn't hurt. Your GP may be the place to start. He may recommend an ENT that he trusts.
Donna, as far as I am concerned the people here all have a spot in heaven. They are on their way to becomming saints (Especially Brian for having the insight to start this wonderful site!). The information and compassion that they share here keeps you working to find answers and a cure. Don't stop until you are satisfied.
Keep us posted.
Frank