(part 2) Since March 2023 I have been suffering regularly from URTIs, and a couple of tonsillitis episodes. I have explained these exposures to my GP. In most cases I was prescribed antibiotics, and, during November, I had to take 5 courses of antibiotics (ending up with Dalacin) in order to resolve tonsillitis  This was followed by laryngitis (was prescribed predisnone for almost a week, then some sinus pain and now a cold. My GP attributes these issues to the fact that we have two school age kids, and the fact that my tonsils are hypertrophied. Mid December I had an episode of oral trush on the tongue (which GP attributed to antibiotic use), which went away on its own, but now seem to be recurring.  

Welcome to the Forum.  Thanks for your detailed description.  While I do not see a specific question here, my sense is that you are worried that your recurrent respiratory tract infections might reflect some process, possibly HIV acquired through the encounters you describe.  I am confident that the activities you describe are not due to HIV or any other STI and are readily explained by other factors such as your children or, in the case of the thrush, antibiotic use.  I would have no concerns about STIs from the exposures you describe.  Your negative throat tests for gonorrhea and chlamydia simply reinforce m my sense that you are not at risk for any STI.  I see no medical or scientific reason for concern or for testing.  Of course, if you have lingering concerns, then testing is easy, accurate and might be reassuring.  
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Yes, my concern is that i somehow contracted HiV, possibly via kissing, and that these frequent respiratory  infections are a sign of an immune system starting to weaken as some literature available on the internet mentions URTIs as happening when the immune system

As I said, there is no medical or scientific reason for concern through the sorts of exposures, you mentioned. Given your concerns, the path of least resistance is to test. I have every confidence the test will be negative, allowing you to move forward without concern. I emphasize, the reason I recommend testing is not because of any concern that you have HIV, but in an effort to Help your anxiety. EWH---

Thanks … I know saliva is said to have low levels of HiV , but would this still be the case if she had a high viral load, say if she was as AIDS stage?

Irrespective of viral load, the bite in your cheek, etc.  there are no proven cases of HIV acquired from Frendch kissing, frottage, receipt of oral sex, etc.  As I said above, I suspect there is nothing that I can say to may you stop thinking "but what if I'm the first..."  For that reason, once again, I suggest you just get tested.  The results will do more than anything I can apparently say.---

Thanks for your prompt replies.

As you know, we provide up to three responses to each clients questions. Please don’t go down a rabbit hole. I am referring to life-threatening infections not every day upper respiratory tract infections. ---