What to think?

So my period is due to come this Sunday 09/16 however Monday 09/10 I woke up to some spotting. Throughout the day Monday I started to have some light bleeding. The following day Tuesday it was dark bleeding and spotting. Wednesday everything came to a holt and stopped. Today it completely stopped. I have never started my period 6 days early nor has it ever only lasted 2-3 days. Please give me some advice. When should I test?