Unfortunately, you have posted your question on the wrong forum. See the instructions at the top of the forum page, including "Welcome to the STD Forum, which is intended only for questions and support pertaining to sexually transmitted diseases other than HIV/AIDS...."
The brief responses are exactly the same as for innumerable other virtually identical questions on the HIV prevention forum: Most commercial sex workers don't have HIV; when a woman is infected, the transmission risk for a single episode of vaginal sex averges only 1 in 2,000; and test results always supercede symptoms in judging whether or not someone has HIV. In other words, it doesn't matter what symptoms you had your test results prove you did not catch HIV and something else has to be the cause. And you are correct PCR/DNA tests are rarely if ever false negative more than ~10 days after infection.
Your symptoms don't suggest any other STD, and I doubt your illness is anything you caught during the sexual exposure you describe. But since you had unprotected sex with a commercial partner (I hope you won't let happen again!), it would be reasonable for you to be tested for common STDs like chlamydia, gonorrhea and syphilis.
Since this is in the wrong forum, there can't be any ongoing follow-up discussion or comments. You could re-post the question in the HIV prevention forum, but I suggest you not spend the additional fee. The reply might be a little more detailed, but not materially different. You can spend some time scanning that forum and find hundreds of essentially identical questions and our replies.
Regards-- HHH, MD
Oh, I realized that I posted in wrong forum.
Could you please still reply.. I apologize for my mistake ..God Bless..