Period

So I thought I got my period today like it was due but its not my normal period. Its barely any blood. Especially on my first day its heavy on blood. Usually I have really bad cramps and pain meds don't help well. I have barely any cramps. I've changed twice so far (sorry tmi) and both times there's barley anything. And on one fron my last change has a little bit of discharge. Should I worry?