First off, you'll just have to wait and see if you got contaminated. There is no sense dumping everything on the basis of 'what if'. You need to see 'what is'. So wait, hold off and let it ride. If you are fermenting too high then you could cool it down a bit, but it won't change much at this point.
My guess is, it is completely fine. Airlocks are really only important during the conditioning phase when CO2 production is minimum. Unless something fell directly into the fermentor don't worry!
Event Horizon ~ A tribute to the miracle of fermentation.
Brew what you like. Do this, and you will find your inner brewer.