I Woke Up To What I Assume Is My Period,

I woke up to what I assume is my period, but it is 2 weeks early. My last cycle was October 2 and lasts 5 days, my next cycle is not scheduled until November 2-3. My cycle is very regular, and this has never happened before. I want to know how concerned I should be? Do I treat this a period, if so what happens if I bleed again in 2 weeks when I am actually scheduled? I am cramping like a regular period but the flow is a little heavier than my normal cycle and the color is a bit brighter red. I am not on any medications or birth control.