On my period FOR 12 DAYS!!

I started my period and it was really light, no cramping either which is weird. It was a little heavier towards the beginning but still abnormally light for me. Well it's still going on and I'm on day 12 almost 13. I don't need to wear pads or tampons or anything, it's literally just every time I go to the bathroom to wipe there's a little blood on the TP. I don't know what's going on... Is something like this normal?