Just throwing in my two cents, which you may want to run by your doctor first.
I experience ear fullness when my disequlibrium (wooziness) symptoms are very bad. Usually the ear fullness feeling comes on with pressure, like my inner ears are being filled with water or cotton. I also have ear ringing during that. What helps me is antihistamine, like Dimetapp or Benedryl. The Benedryl may also may you feel a little sleepy, which will help you drift off to sleep better, even if you are uncomfortable.
I sleep with my head elevated, which is the pits, but if I lie down I feel that I will "spin" most times. You may want to try elevating your head also.
You mention cold sweats with your feeling of dizziness. I'm sure that that is just anxiety from feeling off balance. It's very scary to feel dizzy, so your body is producing a little more adrenaline in reaction, which is normal when you feel nervous or scared. It's a rush of adrenaline and can't hurt you.
A second opinion never hurts. Take care.