PLEASE HELP!!!

Holly
For the past 3 days when i have a bowel movement (not straining) i have some light vaginal bleeding. It was bright red the first day and dark red the 2nd day and today. I have some minor cramping. Ive never spotted like this ever in my life. Im 27, 147lbs, eat well and went off bc last october so my period has been all messed up for almost a year which is expected cuz i was on bc for 10years+. Im not due for my period for another week. But like i said this has never happened before. What is going on?!