Missed period

Hey, so my partner and I had sex a day before my ovulation day, and I’m freaking out because I missed my period. Today marks the end.

I’ve noticed a build up in thin milky discharge instead of my period and I’ve been bloated and on and off again Naseau random times of the day.

I took a test on day 2 of my missed period.

And it came out negative.

I’m not sure. I feel queezy and fatigue ALL the time. What do you guys think? When is the best time to take another test?