I had my period today the 17 of october, my previous period was on the 19 of september does it mean i am on a 28 cycle? best time to get pregnant when

Yes. Days 11-16.: With a 28-day cycle, ovulation happens around day 14. That is day 14 counting from the beginning of a period (the first day of bleeding is day 1). That is also known as 14 days after lmp, which means last menstrual period. If wanting a baby, start having sex twice a day on day 11, for 6 days... And enjoy those days, without thinking about pregnancy, babies, or anything related to cycles.