Spotting instead of menses

I had brown discharge and some bright red discharge on the day I was supposed to have my menstruation on 11th Jan (30th day). Thinking it was the start of my period, I put on pads. However, after 2 days, there were only streaks of brown spotting. From what I searched, implantation bleeding appears to be brown and light pink which mine was brown and red. Could I be pregnant? Anyone experienced the same before?