Should I keep a calendar?
You absolutely can! The only fool proof way to keep track of your period
You absolutely can! A proof way to keep track of your period is to mark it on a calendar. There are plenty of smartphone apps available which can track your period. This will help you figure out how long your menstrual cycle is, which will help you predict when your next period is due. You do have to deal with menstruation, but you don’t have to let it catch you by surprise.