yeah I checked again today, if full blood is in the afternoon, then count next morning as day1. if it's in the morning (I count it if I wake up and it's already there) then that day is day1
usually my full flow starts early / late evening / overnight. so I always have to use the next morning as day1.
today has been nothing though. yesterday there was some spotting. so it could be sun/mon at this rate. it was due thurs, so technically spotting did start then.
they said for fet it's not an exact science, as they'll start monitoring day10 anyway. so there's more BTs then to narrow down natural ov. I'll be interested to see if that's day14 for me or not as I'm usually not sure 100% (so could be missing natural attempts)