Cyclical pain, pain that's related to the menstrual cycle, in a reproductive age woman, almost always has something to do with hormones and ovulation.
Many women also refer to the menstrual period as "AF" which is an abbreviation for "Aunt Flo".
Can I get pregnant while I have my period?
My cycle is 26 days, when do I ovulate?
My cycle is 32 days, when do I ovulate?
My cycle is 28 days, when do I ovulate?
Does the length of my menses (bleeding) have an effect on my menstrual cycle?
How do I count the length of my menstrual cycle?
What does vaginal bleeding shortly before menses mean?