Brownish Discharges And Bleeding

Hi, I'm trying for baby for close to a year now. Recently before my predicted period, I suddenly have brownish discharges and some bleeding. That was after 2 week from my predicted ovulation and of course I had sex around the ovulation. My usual period would have sore breast but not this time. And the discharges were light and lasted a few days only. Its been a week since the brownish discharges. Anyone experience similar? Is this implantation bleeding? Could I be pregnant?