A week after my period, I noted there was bright red blood on the tissue after I wiped. I noted there was no blood in my urine . I thought maybe I was spotting, so I grabbed a liner. The next day, it had only a little residue on it, and when I wiped it was a brownish color. The day afterwards, there was only a hint of pink blood on the tissue paper. And today it is the same, just a small bit. What could this be?