I was only on birth control (ortho novum) for 3 months, but it drove me nuts :( ! I went off of it in may, after I had had my period for may. I did not have a period in june, july, or august!! I took a pregnancy test and it was negative. I had the oily face, which I had never had before, and I would cramp like I was going to start, and around the time I was supposed to start, but I never started!! I just started for the first time since may on sunday. I went to the Dr. Yesterday, and got put on ortho tricyclen lo, and I explained to her what was going on and how I didn't have a period, and she said it was normal. Hope this helped...