Advice??

I need some advice. My periods are usually the same every month. It'll start on same day by my apps. Ill  bleed slightly heavy the first day, then be light for 2-3 more days... this month, I started two days early and have spotted now for 5 days. It's been a pinkish, red tinted, not enough to wear a pad, but there when I wipe. I didn't test today. But have tested negative up until now. I  haven't done anything different this month body wise and so it's weird that my "period" is this different. Has anyone experienced this or know anyone who has?