i'm taking a medicine it'a valproic acid..and my menstration cycle is always delay last august 2013 i'm only delay 6 days but now september 2013 i'm 2 weeks delay..this is normal for me because i'm taking a medicine? i'm taking medicine 1 a day every morning after breakfast.. almost 3 months a'm taking this medicine..but on aug i'm delay..plz..answer me... i'm worry for my health