I am a 21 year old woman. I have been on the pill since I was 15 to regular my period. I recently, in the last couple of months, started taking a higher grade birth control pill becaus of breakthrough bleeding. I got my period last month, but this month, I had spotting and it continued until yesterday. I usually get my periof by now, and there is no sign of starting anytime soon. I have no cramps, but I am very moody, like I am before my period. Should I be worried? And I am not sexually active.