I’m so confused

Stephanie

Im 20 dpo ! What does that even mean ?? I know the exact day I had intercourse it’s the same day I was ovulating I know for a fact that I’m 2 weeks 6 days why does it say I’m 4 weeks 😵‍💫 also at 17 dpo I took a pregnancy test it went positive as soon as I put the cap on and very bold !!