Period 2 weeks early

So I got my period last week, and it was two weeks early. There was light spotting for a couple days, followed by three heavy days, and a light day at the end. My periods usually run 6 days. I was talking to a coworker and she thinks I'm pregnant because of other symptoms I'm experiencing, and she said that she bled for two months straight when she was pregnant with her son, not knowing she was pregnant at all. 
​I do have endometriosis, but I've never experience an early period--ever. What do yall think about that?