Dear James please consult to registered doctor about it. But generally the intervals of periods are from 28 to 34 days - which is different for every woman, OK? Read here also: https://lovematters.in/hi/resource/menstrual-cycle https://lovematters.in/hi/our-bodies/my-periods-are-irregular-what-should-i-do If you would like to join in on a further discussion on this topic, join our discussion board, "Just Ask” https://lovematters.in/en/forum