Brown discharge, freaking out

Hey everyone! I have done 9 pregnancy tests now, they’re all coming positive. I have had cramping, fatigue and body aches everyday for the past week. There was even one day I felt I was getting sick because I had a slight fever.

Anyway, my period is meant to come today and there’s brown discharge. My period does usually start with brown discharge. However, I don’t have period pain, I have cramping that’s coming and going and discomfort around my uterus.

Has anyone been through this before? Is it meant to happen? I have read that it’s implantation bleeding but is the implantation not done already at this point?