Period

Has anyone else exclusively breastfeeding gotten their period yet? I think I started mine today at 8weeks 2days postpartum. I exercised pretty intensely 2 days ago and spotted yesterday and I am bleeding today. I don’t know if I’m bleeding from over doing it too soon ( I delivered via csection) or if my period has already returned? I’m not really cramping or anything, but it seems like I’m having a period. I know it’s not common to get your period this soon breastfeeding on demand, but I know it does happen. Just curious if anyone else has/ is experiencing this?