Weird spotting 3 days after period

I had my period for 7 days and it was lighter than normal, but I’m definitely not pregnant. 3 days after my period ended I started spotting again and it was light pink in color and the next day it turned to a more light brown color and ended so I only had the spotting for 2 days. This is not normal for me so I’m not sure if anyone else has any insight on what this could have been? I know it’s not left over blood because it was pink meaning new blood not old blood. The spotting wasn’t even enough to have to wear anything.