Maybe it’s my month

I’ve been ttc for a while and have felt like I was gonna start my period since ovulation and yesterday at 9dpo I woke up from a nap Bc I’ve been really tired lately and my back and hips were absolutely killing me and my stomach was cramping bad I woke up this morning my stomach had been lightly cramping and hips and back still hurt I never get back and hip pain before AF could I actually be pregnant? Could it have been implantation? When should I test?