Yea man your fine! calm down. I cannot give you the exact reason why, but some strains will do this more than others. My suggestion is make sure your humidity stays high and temps stay fairly cool. Give them a few days and they will perk back up once the rooting begins, maybe not all of them... but the majority I promise! Clonex is good stuff, give them the kinda love you give any clones and watch
something to try in the future - cloning dome (little mini greenhouse) I love them, clone-x plus a little time in the humidity dome and they will be beautiful