It's weird

Okay so my period ended last Wednesday and yesterday I couldn't keep my eyes open at all, when I got up from my nap I started having a cramp that lasted for like 20 seconds, had to pee so I did and when I wiped there was a very light pink discharge??? I mean I know it's blood but it's never happened to me before. Started another cramp after that lasted for 20 seconds... Any ideas?