I have been on Yaz Brith Control since the beginging of April 2009. My period was almost regular before that (starting during the first week of the month), but when I started taking the contraceptive it had move to the middle of the month lasting for 15 days and the second one I had with it moved to the last week of the month. Its the last week of the month right now and I have had sex but I have never missed a pill. It my period still trying to become regular? I have had slight spoting for one day on the 19th of June, but when I read in the book that came with it that, that could be your period. The second period I had on the Pill was also only 4 days long instead of 15. Should I see my doctor or should I wait another week to see if my body is still trying to adjust?