Yep, the beer will be fine. +1 to the comments about running a blowoff tube. If you haven't already, next time you're at the LHBS or make an order online, throw in some Fermcap-S. It keeps the blowoff/krausen in check and is a total lifesaver. Cheers!
Oh, and keep rehydrating yeast like you did - a vigorous ferment is a good thing!