Hi Stand - and welcome, although I'm sure you would rather not have a reason for being here. I certainly can't blame you for that - but allow me to respond to your pertinent question.
Your symptoms could indicate an acoustic neuroma but not absolutely, which is why your doctor wants the MRI scan. Your symptoms, while common with AN patients, might be caused by other issues, including inner ear problems. Although my doctor told me that my AN was "probably growing for at least 10 years", my only real symptom during that period was unilateral hearing loss, which I ignored because it was very gradual so I assumed it was age-related and adjusted to it over time. During the six months prior to my AN diagnosis (4.5 cm) my balance became very poor, my sense of taste practically disappeared along with my appetite and 30 (unneeded) pounds and I suffered from intermittent stabbing pains in my skull at what I later learned was the site of the AN. I also had tinnitus but it was mild and I was always able to ignore it (still do).
The MRI scan (with 'contrast' - that's important) will answer the question of whether or not you have an acoustic neuroma. However, if you do, remember that ANs are almost always benign (non-malignant) tumors and that they are treatable. If you are found to have an acoustic neuroma, it's size, location and growth rate will all factor in to determine your options for addressing it. If the MRI shows you don't have an AN, your ENT will have to explore other possible causes for your symptoms. Either way, the MRI scan is a very valuable and necessary test. It's also painless.
Please try to remain as calm as you can and don't assume anything until you have the facts (the MRI scan report). Even then, there are options for dealing with this kind of benign tumor and, as you probably have learned from reading the posts on these forums, most AN patients do fine. To be candid, although sometimes there can be complications most are ultimately resolved.
Please let us know the results of your MRI scan and know that many folks you've never met are thinking of (and praying for) you. Try to remain positive.
Jim