Hi.....I am 23 And have always had regular periods.....But this month it stopped i have frequent unprotected sex with my partner, but have never fallen pregnant...I have PCOS with moderate symtoms compared to other friends that have it.... December of last year i had a scan that detected no signs of cyths and have also had a recent sexual health check that was also clear.... I have taken several home pregnancy test and they have all been negative.... I am average weight and have not had any weight loss or gain and there has been no prolonged stress.. About 2weeks now i have been feeling no sexual feelings, moodswing, bloating, headachs, discharge and hot flushes.....What could it be if it not pregnancy???