Need answers

I had sex twice on my high fertile day which was two days before my ovulation and once the day of my ovulation day. I took a pregnancy test 5 days before my missed period and it was negative: it’s been 12 days since I had sex on my ovulation and 14 days since I had sex on my high fertile day. I been having symptoms such as my boobs been hurting a lil not too much and I have gotten sick one morning and feeling really nauseous today and got sick today. Which is not normal due to I don’t get sick. I took my second test and it read negative. Am I taking my test too early? Please feel free to comment I need answers?