Any advice on what this could be?

Hi ladies, I need your advice.. My cycle is an average of 29 days. The shortest being 24 & the longest being 32. I was suppose to get my period the 6th of Sept and I haven't gotten it. My cycles are very regular they never come late or early and if they do it's because on my other period tracker app it would predict it a day or 2 early but that's about it. But anyway.. a week before my period was due (August 28th) I had noticed some pinkish blood when I wiped & the next day i noticed some brown (old blood?). Then It became a flow that started light and got heavier throughout the days and that lasted for 4 days. Then for 2 more days it was just drops of blood and that was it. Period was due and hasn't showed.. any answers on what this could be and his this happened to anyone ?? Need answers ughh I'm confused if I really missed my period or if that was my period a week early