my last period is on May 28 th .i am taking treatment for pregnancy..And I have pcod too.Also now I haved duphaston 10 mg table on 15 th day after periods till 10 days. two days after having duphaston medicine I feel back pain and cramping in stomach.i can't sleep or sit through one postion properly due to back pain.now it is near to have next period date.is that symptoms of pregnancy or periods.i have any possibility to be pregnant.