Hi everyone my periods are usually any where from 25-36 days.Ive started using the cbfm .Turned out that this month while checking my ph discovered af had arrived over a wk early ON MONDAY EVENING.(not a problem) Set the moniter following morning as DAY 1 But i didnt have any blood loss till the Tuesday evening.Sooooo do you count the first day as Wednesday(on the cbfm) or Monday?? Help think ive confused myself :think: