9dpo & BFN first response

Hayley

AF is due on Tuesday the 22nd. I took a first response pt today and got a bfn 😞 I am cramping (which I feel is uncommon for me this far from AF). I know 9dpo is still early, but even with an early detection test? I know I'm not out until AF comes, but I'm wondering if I still have a decent chance?