I am a little more than a week late on my period. But a few days ago I start spotting dark brownish red and usually my periods are very heavy... I was thinking this was implantation bleeding but I'm still spotting and it changed to a bright red when I wipe but still dark brownish red on my panti liner. This is the lightest I ever bled. Could it be cervical cancer or ectopic pregnancy? I also been having light cramps in my pelvis area.