So I think its AF

But AF is always a bloody mess the moment she shows. Like the moment she begins it's a whole ass crime scene and a whole regular tampon would be really red normally. I wiped today, after having cramps from 6DPO which is never normal. I'm 13DPO now, AF isn't supposed to be due til the 31st and the TP wasnt red but it was like a pink color. Figured it was AF so i put in but I come to change the tampon and there's nothing but a small little line of brown which again isn't very normal for AF.

Could AF just be off this month or what?