When I have a wee and wipe myself it's light pink on the toilet paper, I had sex on the 6th and 7th October on the 10th I had a brown discharge for half a day, I bled a bit heavier bright red the following two days then it stopped and now it's just light pink only when I wipe could this be implantation bleeding?, I wasn't due a period til the 15th and av never had a period before 30 days ov my cycle, started with the brown discharge on day 27.