What are the tests available to diagnose HIV after the window period?

Hello doctor,

I had unprotected oral sex with a guy, but he did not ejaculate. He penetrated me unprotected for about two minutes and then had put on a condom. After we were done, he removed the condom, cleaned himself, and penetrated again for about two minutes. I stopped him because he did not wear a condom. I am not sure if any semen or pre-semen had entered my vagina. I had diarrhea after three weeks as I am lactose intolerant. I had a sore throat and dry cough with a low temperature, and I immediately scheduled a visit with my doctor as I was nervous. I had a slight fever and asked my doctor to perform an STD (Sexually Transmitted Disease) test. When I got my results, I tested negative for syphilis, hepatitis B and C, HIV (Human Immunodeficiency Virus), and HSV (Herpes Simplex Virus) 1 but tested positive for HSV 2. My period for this month is noticeably lighter. About a week ago, my husband started having diarrhea with an upset stomach. I noticed a rash on his knee which looked more like a bruise than a rash and was red and purple. I also noticed that I had a small swollen parotid lymph node. I got nervous and decided to go back to the doctor so that she could test for HIV again. The results were still negative. My mouth is dry due to a lack of saliva. I am also taking Klonopin tablets to help with my anxiety. The other guy took Oraquick home test and tested negative. I am nervous because I have been feeling tired. Can this be due to the Klonopin tablet? Kindly suggest.