15 DPO/ CD 30 Brown Spotting

I think AF was due 2 days ago. I now have brown spotting with cm only when I pee and wipe, very light- not much at all.

Slight cramps on/ off all week.

Nausea spells.

I haven’t tested because I simply don’t want to waste a test...trying to wait it out.

Any thoughts, similar experiences that ended in a BFP...?