Was it implantation?

Af was supposed to come on the 9th, that night I just started cramping then the 10th had cramps and backache, still no af. So I’m 7 days late, was it implantation cramps? When is the earliest that I can test? Thinking about just waiting till November to test and have the mindset of whatever happens happens? Idk 😐 if I can wait that long.