taking the pill at different times?

im on the pill to help keep my cramps under control. i take it every weekday at 6:30 am since thats when i get up for school. on weekends, i take it around 8:30-10:00 depending on when i wake up. im not sexually active as of right now. for future reference however, would this be okay for when i do have sex?? or should i take it the same exact time every single day?