i am 18 years old nd i have done sex with my boyfrnd...i used to have mensis on 23 but it came late til 27 or 28...my boyfrng used protection during sex but i'm not havinng mensis yet its 5 march today.i have used penorit tablet but still mensis dosent came.i'm having a kind of pain which i used to have during periods.vomating if i eat some thing it comes out by vomating ...give me a good advise.please help me..