9 day AF?

Lillu
Never had this before, my period has lasted over a week now and still no signs of stopping! I've gone through an entire box and then some of super tampons, when usually I only use them the first two days. AF was on time, hpt 2 days before was bfn, and now glow says i start my fertile days tomorrow! Wtf I'm so confused and starting to worry. My af has always lasted for 4-5 days, with only 2 being this heavy..soo whyyyyyyy????