Hello - this is the first batch of chick eggs i have ever incubated. We are on day 21, saw first pip on one egg at 11:20am. i heard peeping at various times during the day, now nothing. It's 10:20pm, 11 hours later and no change or movement. i have 29 other eggs in there and nothing from them. Should i be worried? Thanks for anyone's time to respond. Oh, still air incubator, temp at 100.5, humidity at 70%.