What’s the latest you’ve got your bfp? Do I still have a chance?

I’m new to this so bare with me!

I’m on cd31 and still no period...

Iv been having headaches, light cramps, back ache and a little constipation. I feel like iv been weeing more and my cm went to a milky white and there’s more.

Two days ago I had this shooting pain right through my vag up to my belly button, it didn’t hurt but was uncomfortable and never experienced it before. Iv had no implantation bleeding or spotting.

Iv been testing for last three days with one step early detection and all three negative! 😩

Is there a chance I could get my bfp still?

What’s the latest you have got your bfp?