I am on marvelon and have never had an issue before. Today I had spotting, a little red discharge followed by brown. In the month of Jan, I missed a week of active pills (but had no sex) then I was told that if I took it for 7 days I will be protected by the 25th, which is when I was meeting my long distance bf and we made love on the 25/26th. And I have been on the pill since the 18th Jan till now. I thought I had taken all the precautions so the possibility of being pregnant seems to be slim. Any ideas?