hai I am 28 year old.with a height of 5.3 and weight of 66kg.To attend a function last October i have taken regestrone for 7 days(2 per day) as prescribed by a doctor.so when i stooped intake of medicine periods came normally.But for last 2 months i don't have any periods.i have my pregnancy test 3 times and its negative.so i again consulted doctor after 60 days she prescribed meprate 10mg for 5 days .Its my 9h day after taking medicine.last day i have seen a little brown discharge.For how long i have to wait to have my periods? .whats problem with me? please help. Regards xyz