Opinion ?

I had intercourse on the 20th of October which was my first day of Ovulation. We used the pull out method. However, Felt nauseous about a couple of days later and eventually it turned into mild cramps and headaches after the nauseous finally calmed down. I started to have white thick or clear discharge as well on and off. My period was due today but I still took a pregnancy test the day before it and another one today. Both came out negative😕 any idea what it could be?

P.S keep the negative comments to yourself. Please and thank you 😉