I lost my virginity about 1 1/2 weeks ago to my current bf. We used a condom, and I am also on Ortho Tri Cyceln LO birth control pill. But my concern is that I may be pregnant because I am about 3 days late on getting my period. Is it true that having sex for the first time will cause a delay in menstrual cycles? Also, I have been getting this brownish discharge... what does this mean? Is it a sign of pregancy?