C&R,
You could feel worse on a new med temporarily but I find it hard to believe you're still compensating after all of this time anyway - that is if you don't have vestibular migraine (which I def think you have developed considering the family migraine history).
I think that for some of us where the disposition for developing migraine was higher than average, that a vestibular upset was the last straw for triggering it. Remember what Rauch says in his vestibular migraine plug - that if a migraineur develops any other balance disorder (VN, BPPV etc) they tend to become sicker than non-migraine patients. In these cases migraine is a common aggravating cofactor. Of course migraine itself causes the dizziness in many without any previous vestibular assault at all. In my case, I know (or at least I'd bet the farm on it) I had a viral attack somewhere in my vestibular system. My already low-level background migraine hassles that produced only neck pain grew into the beast it is today.
Anyway, I'm certain a migraine med will finally sort you out or at least remove more of the discomfort you are putting up with now.
S