Implantation experiences please as late but bfn

Victoria

Hi

Could really use some advice please

I’m on cd35, my cycles have been between 24-29 for 8 months, I had spotting from cd28 to cd 33 on and off but literally a little pinky brown on toilet paper every so often. I have had some cramping to but now nothing I tested

Last 3 days had BFN.

So please can I hear your experience on if this is implantation and when u got ur bfp

Thanks x