So I was wondering if I could have had implantation bleeding. On July 29th I had sex, and around August 10th I had very light pink discharge and a very small amount of it. I took a test on the 15th and it was negative but I don't know if that was too early to test or not. I am on BC and I skip my placebo pills and just start a new pack one right after the other(as per Doctor). Help?