Symptom?

I'm smelling vinegar. And there is no vinegar around.

Am I having a stroke?
Is this a symptom of a migraine?

This happens occasionally, but I've quit telling people. They look at me like I'm crazy.

I smell Krispy Kremes sometimes too, but that's just because Krispy Kremes are messy and I usually end up getting some on my keyboard or mouse.

**Update**
Apparently when film breaks down (or something) it emits a vingear smell. And we have old films in the room right around the corner from me. Mystery solved. And I'm not having a stroke.