Hey Jesse,
Good question, but luckily I think you should be okay. Only real way to tell is to allow fermentation to finish, then smell / taste the beer then. It sounds like fermentation was going pretty aggressively, which means a lot of CO2 production. Your wort should have a nice blanket of CO2 over it, which should have prevented much (if any) of the outside air from getting to the wort. If something with substantial weight fell in (a bug, piece of paper fell off your desk, etc) then you have a good chance that it got contaminated, but other than that, I'm guessing you'll be fine.
Good luck with that, and hope the batch turns out well for you!
Cheers.