My cycle is usually between 31 and 33 days long. However, this month I got an OPK on day 14 (a Saturday). My thinking is that I would have ovulated on the Sun or Mon. Based on that, AF is now 1 or 2 days late. However, based on the normal length of my cycle, it isn't late yet. Did test yestersay afternoon but was negative, although didn't manage to pee on it for the required length of time. Slightly fed up of seeing neg tests after a year of TTC no.2 so don't want to test again unless there really is reason to think it mught be positive. So how shiukd I work out if AF is late?!