2nd Lh surge at 3 dpo?

It could be your body geared up to O on Sunday and you didn't release an egg, therefore your body geared up to try again and now just released the egg. Did you BD again last night just to be on the safe side? There is no way the OPK is giving you your BFP right now at 3DPO. Implantation wouldn't have occured. It might be more of the false positive on the OPK on Sunday. Good luck to you!