Hello! This is my first time incubating chicken eggs (or eggs in general). I was given the eggs last Friday and was told I could just put them under a 40-watt bulb. I did that and noticed the eggs were not getting warm, so I bought an incubator. I put the eggs in the incubator last night. My question is, do I count last week in the 21 days or start it last night/today? I want to make sure I'm not flipping them when I shouldn't be. Thanks for your help!