I am a sexual active teen, who has been with two people.I am with my second currently. I last had unprotected intercourse with him many times, two Sundays ago. ever since then i have had watery discharge poring out of me. I have had to start wearing pads. Yesterday for a couple of hours i notice there were two drops of red blood when I wiped. When i checked the pad i wore last night, for anymore blood, It was of strange yellow coloring. This has never happened to me before, I am beginning to become very concerned. My period starts in 15 days time also, could it be to do with that? What is happening to me?