Af or implantation?

Hi so I’m just confused . Yesterday and day before I had brown cm spotting very slight though . And then today I was due for my af . So right now I see a bit more bleeding but not a lot . Is this my af or part of implantation ?

Also I used clear blue opk and we baby danced on the flashing smileys everything other day and the day I got a solid.l smiley. We baby danced when I got the solid . But after that we didn’t . Like on my ovulation day I didn’t or after either. What do you guys think it was that didn’t workout for me ? :/ I’m bummed .

And I had been feeling twinges on my sides and pelvic the day of light spotting which was from 12 dpo-13 dpo.