Your period marks the beginning of your menstrual cycle which on average lasts around 28 to 30 days, but as none of us are the same this can range from 21 to 35 days. Your actual period (when you bleed) will last for between 3 -5 days. When your period starts it’s a good idea to make a note of the date (you can even download a smartphone app for it!) which will help you figure out your menstrual cycle and when next to expect your period. Simple!