My period is irregular and this started at the age of 13 and now I'm 17 I notice that I can go a year without having my period and then suddenly I'll have my period I decided to go to a gynecologist and told her my situation she then prescribed medroxyprogesteron to start my period and take 1 of those everyday for seven days and then take birth control to regulate my period well I took 1 pill for seven days and waited an extra four days BUT without taking medroxyprogesteron and my period still haven't came 😞 any idea why ? Or suggestions?