Confused

Kelsey • Amelia 💗 Charlotte 💗 Tyler 💙

I got a positive ovulation 2 strong lines on Saturday 25th. It says here to have sex on the day of ovulation and over the following 3 days. Saturday I had sex late as my partner didn't come home late so about 1am we did it. Sunday we did it but I didn't test and Monday 27th I tested and got a negative results?

I'm confused