For the past 4-5 days I have been having cramps but they aren't painful enough to make me stop doing what I'm doing. Now all of a sudden my period has started today, which is 7 days early. I have been on sprintec (birth control pills) for almost 2 years now and I have never had this problem before. Should I look into calling my doctor or should I see how it plays out the next 2-3 days and go from there?