I'm sure you have stress, but your AN is the reason you are dizzy. I had horrible dizzy spells, and even had to be in a wheel chair because I could not walk without throwing up. My eyes and my ears could not agree on what was vertical and horizontal. The lights at your dinner confused your eyes, and your ears should have balanced you, but one of your ears is not working correctly because of the tumor...so you get dizzy. Same problem driving...you are turning your head and your eyes left and right, up and down, and your AN ear is not sending a corresponding report to your brain that your eyes are, so you get dizzy.
If you close your eyes with your feet together, you will probably start to fall, because your AN ear is confusing your brain. Vertical??Horizontal??? Brain is confused!!! Open your eyes, and all of a sudden you can balance because your eyes are balancing you. This is very exhausting, and you are stressed, and full of worry. I will assure you that after you get treated, you need to get physical therapy. Two things will happen. Your good ear will compensate for the loss of your AN ear, and PT will make this happen faster. Number two, your life will return to normal. Slow recovery, but you will be "normal" again. Complain all you want, and we will listen to every word, keep patting you on the back, and pulling you along.
James