Oh yeah, Nan you are totally talking about my case scenario!!
Up until my diagnosis, I had absolutely no discernible balance problems at all.  I  used to hike solo to take pics for paintings and would climb up waterfalls and rock-hop up streams.  Noticed that I was a little slower than usual in the last couple years, but what the heck, I'm 50 years old.
Anyway, if dizzy means lightheaded and off-balance feeling--that took at least 2-3 years to partially go away and still flares up a. when I've been excercising hard, b. in the dark c. In a crowded place like a mall d. when I'm tired.
I was in physical therapy for 6 months trying to re-train my balance (in between migraines).I had to quit because the headaches kept me in bed 4-6 days a week.  The as the headaches started to fade away, and I was able to be a little more active, my dizziness started to improve.
The brain will compensate over time, but it really needs help--i.e. activity and balance excerises for the two remaining systems on the affected side--the eyes and skeleto-muscular(particularly the sensors on the bottoms of the feet.)
If you are 9 months post-op and haven't done much PT or walking, you are likely to still be pretty dizzy like I was. My headaches kicked in about 5 to 6 months post op, but up until then I was working like hell on my balance, I was walking a mile 2x a day while I was recouping in Florida for 2 months.  I didn't get out as much when I got home due to the weather and the hills where I live, and I seemed to get worse for a while. That's why I got myself to a physical therapist who was trained in vestibular rehab. She gave be bunches of home excercises which I did religiously. ÂÂ
There is a website for VEDA which is for vestibular disorders--ggogle it--has a lot of great information.
My AN was crawling out into the CP Angle like yours was, too and was just slightly smaller.
I fully believe that you can get better, like I did.  We are all here to give you the encouragement and inspiration that you need.  It's hard to do on your own, believe me I know that!  My physical therapist was incredible--called me at home, listened to me cry, encouraged me, praised me--even though I called her "Elivra--mistress of torture!"
Call me anytime you need to talk or if you have any questions.
Capt Deb