Does it really only happen when you drink?
Have you had a cold recently?
I have dizzy spells for a few weeks sometimes after a cold. It takes a while for my ears/sinuses to clear out. It can be a PITA. Sometimes its so bad I can't walk or drive.
Kegged: #114 Oatmeal Stout, #115 American Amber
Planned: APA, IPA, Nut Brown