don't worry, it will probably grow again 
Everybody should be used to it by now as it's always happening right in front of our eyes. Just see the graph and look how it dance as it moves up and down so nothing to worry about. Another forks are coming this month so better hold and wait for the drama to be over.
if in case the bitcoin price falls, I think it is a reasonable occurrence of bitcoin prices. bitcoin prices often decline but the price will rise again, so we do not have to worry about this.