Theoretical risk is not true risk. No one has gotten HIV from oral sex that has been proven and documented. So, it is considered a non risk in general. I would not be worried about HIV from your exposure and your negative test result proves that.
Going off the translation, you had unprotected oral sex. This is not a risk for HIV. HIV is not transmitted during oral sex because air and saliva and air inactivate it. The hiv virus is actually very fragile and hard to transmit. The only way adults get HIV is from unprotected vaginal or anal sex or sharing IV drug needles. You also didn't need to test. But since you did, you should trust that negative. It was in the conclusive time frame. You do not have HIV.
Translation: Good morning, I have this terrible doubt, it is possible to get infected with vih by unprotected mutual oral sex with a prostitute, 45 days ago of this situation. And I was with colitis and stomach noises, also pain in the testimonials and my white tongue was put on and I had a cold for 5 days. Which is why I was pretty scared. I took a CMIA test at 21 days of the event and also an ECLIA at 42 days, giving both negative. My doubts are: could I have been infected by cunnilingus?
Do I need another test? Or are these 2 results reliable? I want to add that I talked to her about how I felt to this woman, and she told me that i was a healthy person, she sent me her STD and HIV tests with negative results.
In advance thank you very much