Tomorrow I will be 9 dpo and I started some thing like a period Monday. But there was minimal blood, enough to wear a pantyliner. I have had the biggest clots I have ever had this whole time. The first day a huge brown almost black looking clot about the size of the palm of my hand. The sizes have varied though out the days. I have cramps, backache, and severe mood swings. I'm not due for my period for a week plus. I have had unprotected sex numerous times but have taken a plan b immediately after.