period talk!

I'm usually a 3 day period kind of girl with crazy cramps the first day but this period was different 1. I didn't get cramps at all 2. No breast tenderness 3. No back pain ( which are alllllll the usual every time I get my period ) 4. My period is super light so my question here is why did I start bleeding again (after I've been done for technically two days) and why was my period so out of the ordinary?!?!