Implantation/AF

I’ve been feeling AF coming for a couple of days now. Yesterday she was suppose to come but Today I had really light bleeding. Then I went to the bathroom again and it was gone. Went to the bathroom again and it was heavy for a little bit. Now it’s brown as if my “period is over” i have endometriosis so my periods are always horrible to the point where I cant even deal with the cramps or the amount of blood I lose. I havent had any cramps at all. Maybe I should test, maybe I shouldn’t? What do you think?