hi

hope i can get some help with this one and i hope it is not to confusing and i feel a little silly asking but i am having a bit of a moment here lol

okay i am on cd27 meaning of course tommorrow is cd28 so if af arrives overnight does that mean my cycle is 27 days or 28 days

or put it another way

when i get asked my cycle length i usually say 28 days, however it has got me thinking, if af starts as day 1 and it starts on the 28th day from the last cycle does that mean my cycle length is 27 or 28 days

i hope i am making sense here - sorry if i am not