Welcome to our forum and thanks for your question.  Your situation is not an uncommon one.  We hear from numerous clients who find that, following a sexual encounter that they subsequently regret, they become aware of irregularities in the appearance of their tongue, joint or muscle discomfort or other symptoms which they wonder about in terms of risk for STIs including HIV.  From your post it is clear that you have been thoroughly tested.  The idea that there are strains of HIV which might not be detected with current technology is an example of the all too common incorrect statements that are regularly found on the internet.  I will point out that you have now been tested for HIV in three different ways (for RNA, for HIV antigen, and for HIV antibodies) and all tests are negative at times when their results are conclusive.  You can be entirely confident that you did not acquire HIV or other STI from the encounter you mention. My advice is that no further testing is needed and instead, consider the symptoms you are experiencing, how much they trouble you and if these concerns are still worrisome or troublesome to you once you accept that they are not HIV or STI-related, then work with your doctor to have them evaluated. 

I hope this perspective is helpful.  EWH