Is it normal for implantation bleeding to last over a week? I started spotting on the 25 was suppose to start my period on the 28 never got it and have been spotting pinkish brown color off and on (mostly just when I wipe) since the 25 and on the 1, 2, & 3 it was heavy to where I thought I started my period but then stopped and went back to spotting. I have also had mild cramping off and on since the spotting started?