if ur problem is that u can't keep track of ur period I highly recommend downloading an application on ur smart phone (if u have one) I use "period calendar":
https://play.google.com/store/apps/d...periodcalendar
it's great cuz it notifies u a day in advance or on the same day that ur gonna start ur period and u can monitor ur cycle days, fertile and ovulating days.
there's a lot of options on the market some that reminds u to take ur birth control pills too.