Oh no! Well, since none are externally pipped yet, I would go ahead and take out one at a time briefly and put them up to your hear to listen. Very lightly scratch on the shell with your fingernail and talk to it, see if you can hear any response. You should be able to hear any light scratching or peeping that way better much better then from the incubator. I'm just getting a little worried about them as well now. :/ Let me know what you hear! If you don't hear anything at all, go ahead and candle and see if there is any movement going on.