Just curious... 5 days after I had sex, I got my period and was it on time and heavy enough to fill the whole pad and had to be changed a couple of times. It was also bright red with clots. What made me wonder was that it only lasted three days. My period usually lasts 5. I have heard implantation can be heavy and also heard of decidual bleeding that occurs around the same time as the expected period. Not to mention after sex, I spotted brown and some pink then bam, there was my "period" and now I am spotting just brown again when it was off. What do you think?