Hello, I've recently had brown discharge for around four days now, which started after having intercourse (which ended with my having period-like cramps); I have not had any cramps since, and have taken two pregnancy tests which both came out negative, since I thought this could be implantation bleeding. I am on a birth control pill and I have protected intercourse as well as my partner not being able to produce pre. The possibility that I am pregnant seems extremely low, yet this brown discharge equates to me having implantation bleeding. There also seemed to be a small amount of bright red blood the second day, but tiny amounts of brown liquidy discharge since then. Please respond back with any similar experiences or advice! Thank you.