Implantation cramping?

Shelby • Happily married with a beautiful baby girl! 💗

Hello, I'm 9dpo, I've been crampy on and off in my lower abdomen today, and my back is achy. Kind of like a pinched nerve feeling? I had hubby crack my back to see if that would help but nope. The back is what hurts now, and it feels nothing like af, and it's been going on for a big chunk of today... what do you guys think, could this be start of implantation cramping?