im 27yrs,married for 1years.im planning to have baby.so when i go n see doctor,he prescribe a folic acid n sduphaston 10mg.already 18day im taking the duphaston 10mg,twice a day.19th oct i suppose to get period,but until now the is no period.my period is regular,i will get 3days earlier,but now delay ready.im worried,and im having lower stomach pain,n discomfort.pls help me.i already check UPT,but its negative.im hopeless now.