8dpo update

A couple of days ago I experienced brown blood in my underwear during a bathroom break. I read that it could be implantation bleeding. This occurred 6dpo. I have been spotting off and on since. Ive been having cramps and a pulling sensation on either side of my pelvis. I am testing tomorrow morning at 9 dpo and I am scared of the results. I feel like I'm pregnant but as the days continue I start doubting. I will update you tomorrow!