Krystine,
Michelle and Sharon are right, you're not alone. Believe me, anxiety can play tricks on you. Now and then I have to ask myself if I'm dizzy and nausous because of my AN or because I was up all night worrying about my AN. There's just so much uncertainty a gal can take!
What helps me most is focusing on facts. In your case, the one big fact is that you need to have a MRI to see if you have an AN and if you do, what size it is. Can your primary care doctor, who is probably more familiar with your anxiety and claustrophobia, order an open MRI for you? I doubt the films say "open MRI" on them, so your ENT may never know what machine you used.
Once you have the MRI behind you and have a diagnosis, things will be a little different. I'm not saying your anxiety level will be less, but there's something to be said about knowing for sure.
This is not an easy road to be on, but we're right there with you. Let us know, okay?
Betsy