Hi. My periods date is 31st August last month. It has been little irregular from past 2 months. Although it should now happen again around 31 September I am getting a feel that it's going to happen now again because of cramps etc. I'm travelling outside. I want to delay it. Prescribe some medicine. Also tell me if periods not going to happen now after I stopped medication period wll come around 31 only is it? Please help urgently.