I have been on birth control for years and am good with taking it at about the same time every morning (within a couple hours). I recently started having sex again on the 8th day of pack (and was sexually active on the 9th, 10th). I then started bleeding on the 11th or 12th day of the pack. This doesn't seem like break through bleeding, it has lasted for over 2 days and and is fairly light, but heavier than spotting. It makes me really nervous that I'm bleeding like this in the middle of a pack after having sex. Is this a sign of pregnancy? Am I ok?