Confused

Okay so I got a positive opk on the 16th, 17th and again on the 18th which appears to be when I hit my peak? So I would’ve ovulated on the 19th correct? Premom has it as the 19th and glow the 18th. Started spotting just a little while ago and so I’m hoping that it’s just implantation since I’d be 12 DPO in that case instead of 13. Premom updated my start date as the 3rd now instead of tomorrow.

Since I clearly got confused about it all we had sex on the 17th so if I’ve still got a chance I’m hoping that did it for us.