You want to have sex the day of peak and 2 days after to make sure you catch the egg incase you ovulate later. The only way of knowing when exactly you ovulated is tracking bbt or through a blood test 8 days after peak x
Thank you both 💕
Also remember sperm can live up to 5days so bd before on and after for optimal chances
Once at peak, your egg will release 24 to 36 hours. Keep testing