I am not a young adult compared to you, but I feel it is necessary to respond. There are three nerves that this tumor has an impact on, hearing, vertigo and facial nerves. Your vertigo and facial nerves are being impacted, according to your post, and your hearing is probably being attacked also, and that may be a long term problem for you and you just may not be aware of it yet.
Your choices are to wait or to get it treated. This is your choice and you will figure out what you will have to do. Listen to your doctors and read this forum front to back. Lots of anxiety...but I will tell you, this may be the most difficult part of this experience.
What ever you decide to do, this is not the end of the world. MOST of the people here, from what I observe, have a good out come from being treated. It is not a brutal experience. If you have two children, you have experienced more difficulty physically than you will from this. There is a recover period from the surgery and/or radiation treatment, but I'm sure you did not get in your bikini right after you had your kids and go to the beach. Recovery takes some time. Since you are young, that is a good jump on your recovery. It was not painful to me physically. Anxiety was my worst enemy. I would do this surgery again tomorrow, and not loose any sleep about it tonight. If you are going to be treated, get into shape and it will help you recover. Eat the right foods. Read this forum and you will see most people here have great out comes. It is rather unreasonable to believe anyone on this forum would tell you it is a walk in the park, its not, but it is highly unreasonable that anyone here would tell you this is the most difficult surgery there is. I's rather do this again than go to the dentist.