Implantation spotting?

Lavender

So I misplaced my thermometer twice this cycle and of course the second time was during my fertile week. 🙄 I believe I ovulated on cd15 or cd16 or possibly even cd17 (highly doubt that though) due to ewcm and cramping so I think that puts me between 9-11dpo. This morning my temp slightly dropped, I had a sharp pain radiate through my lower abdomen, and then this what I got this afternoon when I wiped and had nothing else since. I normally start spotting a day or two before af (last cycle was about 5 days before af) so I dont want to get my hopes up but does it look promising? I'm due for af on Thursday or Friday.