i had sex with my boyfriend as we usually do but his time it was different afterwards i went to the bathroom and it was a tiny dot of blood on the tissue . of course it sound like the sex was just too rough , but now i’m spotting .. 2 days later ... pretty dark blood in my under wear , kind of looks like “ old blood “ after a period .. it’s 11 days before my next period so i know it’s not my period , plus my period is usually pretty heavy , and this is very light but Dark blood .. what’s going on ?