Hi! I am 34 year old and single. I have the issue of irregular period. I have been visiting gym and they always give me regestrone 15 mg for first 4 days and 10 mg for 16 days for prolong periods. I replicate the 21 day course this time myself, skipped medicine on 12 day and then took it on 13-15 day. Suddenly got my period on 16th day with heavy bleeding and pain in pelvic area. Is it normal? Should I complete my 21 day course or let the periods happen and wait for them to stop normally.