Opk as preg test?

I've seen multiple things about opk's being used as pregnancy test? Not to a T..but it can still pick up hcg? I took this one for giggles..but i ovulated on the date marked on the picture below (the 6th) ..is it possible i may be prev, since the opk test line is kinda darkening..? I NEVER OVULATE two times in one cycle. 6dpo thank you in advance for any opinions or experience! Baby dust to you all💜👼👼💪😘