Suggest Remedy For Delay In Periods

i m 21 yrs old and i hav menstrual problem for last two years..i consulted a gyneacologist.. ultra sound study was done and it was found that i had pco.. and she suggested me krimson 35 tablet.. i had tht for five months and the periods was normal. she asked meto discontinue.. now again i hav problem.. i dint get my periods for two months.. pls help me..