Cramps and vaginal pain
as also spotting are usual with the pill, but in the early months of use. it is also possible to experience clotting disorders with the pill. since you are only in week 9 and cannot expect a period now, I suggest that you see your doctor for a checkup and take treatment. Though you did not have intercourse this month, pregnancy
should also be ruled out. You should also look for drug interactions if you are taking some other medication also. Good luck.