You're fine. Propylene Glycol isn't a skin irritant, and you'd have to drink a full glass of it to even get sick. (Heck, if you swallowed a little bit of the mist, you'd actually have a little bit of an energy boost! It converts to a type of sugar! )

Probably the worst side-effect is the slight purple tinge it would add to your skin until you washed it off. Kind of Walking Dead makeup...