I'm smelling something that makes me gag.?

Every now and then, for no reason (meaning there is nothing that prompts it), I smell something that I can describe as a mixture of burning soapy lint and film. This happens anywhere I go, not just certain places.

Sometimes it makes me gag, and other times it is so overpowering it is all that I can smell, and taste. It can last from anywhere of 10 minutes to an hour, and nothing seems to be able to stop it, or get it to go away, so it goes away on time.

I do NOT smoke, or do any other recreational drugs.

I don't drink either.

Medical wise, I do have optical migraines, but that is really it.

I do chew gum, 5 gum in fact, spearmint. I don't know if maybe that is the contributor to it.

Any help would be appreciated.