I have been taking birth control for almost 6 months now and my period has been on the last set of green pills except for my fourth month, it came early because I am pretty sure I missed a pill but I just continued taking them from the pack. The next month it was regular but now this month its early again (but its not heavy like it usually is) and Idont think I missed any pills.
So I wouldnt be worried except I am still a virgin and Im getting married in less than 3 weeks so I just want to make sure its working.