Dizziness and vertigo were my presenting symptoms. I don't think I was quite as bad as you are describing, but I was constantly mis-stepping and bumping into things. I couldn't stand with my eyes closed or I would lose my balance. I also couldn't walk a straight line more than a step or two.
I'm almost 3 weeks post-op and in some ways things are better, and in some they aren't quite there yet. The spinning and vertigo feelings are gone. That's a blessing! Before, if I stared at a still point on the wall, everything else in the room would appear to move. That's stopped. Also, when I would lean my head forward or back (not even fast, just slowly), I would get a very overwhelming spinning feeling, so bad that I would almost fall if I was standing. That's stopped also.
My balance isn't quite back yet, though. I'm working on my balance exercises, and I can already tell a huge improvement. But to be honest, I still have a way to go. I still wouldn't be able to walk a straight line, but I
can stand with my eyes closed. I do have to pay attention when I am walking, it's not completely natural yet. So, I think that my balance is great when I am still, but the one side hasn't quite fully compensated when I am moving.
I hope this all made sense. I don't know all of the technical terms for everything, so I just tried to describe it. My doctor said the same thing Clarice did about the damaged vestibular nerve sending bad signals. I think that was the case with me and that is why my standing still balance is already better than it was pre-op. One nerve is better than two if one of them is just sending junk along the wire!
Lyn