Help!

I just got my period, or what seems to be a lighter version of my period. Also, it came 5 days earlier than scheduled. My periods usually last between 3-5 days and heavy dark flow. This period is very light (not even enough to need to change a pad) and it's pinkish/red. It started early this morning. I've had mild cramps come and go. I'm a little curious as to what could be going on? I'm 25 and my periods have always been the same. This is very strange to me. Any advice?