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.
Primary/Secondary: #132 American Wheat
Kegged: #130 American Pale Ale, #131 Stone IPA clone
Planned: London ESB, West Coast IPA