The one time I actually purchased tampons before af makes its entry and it ends up being late! Ttc so never bought them before caz I would always say this will be the month and what do you know af shows up on point some times even a day early so know that I chose to be prepared af choose to be late 4days so far!!! idk what to do know afraid to test been ttc for 1year and 4months.... has this happened to you what was ur out come??