Period two weeks ago?

I had my period two weeks ago and today when I was using the restroom there was a light pink discharge I'm not on birth control but my bf are very carefull we use the pull out method or condoms and it's worked for 4 years so I googled to see what this could be caused from and the only thing that would come up is impalntion bleeding but I really don't think that I am prego so does anyone know what else this could be caused from? And has this ever happend to anyone eles?