I have been taking Marvelon for 9 months now. My last period was on the 23rd Dec which is a Friday. My period, since taking Marvelon has been constant, always arriving on every fourth Friday. Last period though, it was a few hours late, and today, which its supposed to come.. has not arived yet and it it almost a day late now. I have been having frequent sex with my partner last month(holidays) and the last I had sex was on the 13th January. Am I pregnant? Another side note, before taking Marvelon, I barely got my period. Only a couple times a year. I did a pregnancy test today, it said negative but maybe its too early for a pregnancy test?? Im worried