Am I pregnant?

Hi all,

I am tearing my hair out here.

I ovulated (High LH) surge on day 19 of my cycle. I am now on Day 32. (I have an irregular cycle period normally comes day 29/30)

Yesterday I had very dark brown spotting. Only when wiping. Normally if my period starts I go full blown red heavy period.

The spotting has since stopped.

Took a test yesterday was negative.

Could it be implantation bleeding? I did read online you have to wait at least 2-3 days to then pick up HCG.

Would appreciate any comments x