So I am a first time hatcher and I'm getting worried. My 12 eggs are in lockdown and, when candled on day 17, they all were moving and very much alive. I haven't touched them since then and have left the entire bator alone except to pipe in water. It's going on the night of day 21 and nothing has happened yet. Are all of my babies dead? :/ I don't dare open/mess with them yet.