I know it is really, really hard to be patient. Especially the first time (and the one after that - maybe it's just me but I always get excited). Do just leave them as sometimes it's really hard to see the initial external pip and floating them if they have made that pip will drown them. Fingers crossed! 

but I have a feeling they haven't survived..should i just leave them in for another 24 hours because I would hate to open one now only to discover a live chick, but then I would also hate to leave the chick and then open it days later to discover a fully grown chick that's dead inside.