Last month I started to have some brown spotting between my periods. I didn't think much of it, but it seriously lasted from like...five days after the end of my period until the beginning of my next period. That worried me. But it went away after my most recent period ended, so I thought I was fine. But today I noticed it was starting up again. My period ended a week ago. What is going on? If it means anything, I had protected sex with my boyfriend last weekend and the weekend before it happened last time, if that means anything. I also have poly cystic ovarian syndrome. Any help??