WHY AM I BLEEDING

I am ttc, have regular cycles, and not on any contraceptive.

My period ended the 22nd,

A week after that I had pink discharge only when wiping

Then a few days passed and I had brown discharge and pink discharge when wiping

Now today I had a small gush of dark red blood so I put in a tampon but I shouldn’t get my period until the 18th!!

WHAT IS HAPPENING