I don't know if I should have counted the first day of my last period as Thursday 2nd or Friday 3rd. I was spotting from lunch time on the Thursday and got a light AF late evening, but it didn't get heavier till the Friday, so I counted it from then. But now I'm thinking I should have counted it from the Thursday, cos you can put spotting or light flow on FF, can't you. So have I messed my chart up now. What do you all do if you start AF in the evening? Count it from the next day?