Hi, Rebecca:
You certainly are having a lot of stress right now and much of it is unnecessarily caused by insensitive doctors and the health care system. Well, at least the tongue surgery (biopsy?) went well.
I don't believe that telling your mother about having an MRI scan would be so bad. She might be able to help. However, if she worries a lot, as you mentioned, then I can understand your hesitancy about informing her of your symptoms - and having the MRI. That will have to be your decision, as you know her best. I think that an MRI, the closed version, probably, needs the gadolinium (dye) to highlight what may be a relatively small AN tumor. You wouldn't want to waste any more time, money or effort and come up with a useless scan.
You're going to have to schedule another MRI to ever find what - if anything - may be causing your symptoms, which do sound a lot like AN symptoms, but who knows? To my knowledge, an acoustic neuroma tumor affects the side it is on (right or left), but I could be mistaken. I'm not a doctor and I certainly don't pretend to know everything about AN tumors. That's why we have this website: for information.
No one will argue that the health care system can be a minefield but that most of us fear that a 'universal' system could be much worse. Anything run by bureaucrats usually is. Good intentions don't always make for good medicine. That doctors, for all their learning, don't always know that much, is obvious to those of us who've gone through medical problems over time. Some physicians are great and have an excellent 'bedside manner'. Others are borderline inept and treat patients like cattle. We've seen it all.
Rebecca, I trust that your MRI can be re-done the right way - soon - and that you can eventually share your concerns with your mom. I also hope that either you do not have an acoustic neuroma tumor - or, if you do, that it's a very small one. I prefer the latter.
Jim