3 months ago, I had sex with someone I met online. He said that he was clean but I'm not sure. We used a condom for vaginal sex, however, not for oral. I performed oral sex on him for about five minutes and I did taste precum. He ejaculated on my stomach. 13 days after the incident, I had a rapid hiv test done and it came back negative but I keep thinking that was too early and I am worried. I keep feeling hot, achy flashes throughout my body and I don't have an appetite. Is this anxiety or should I get tested again??