Welcome to our Forum. I have several comments which I hope you will find helpful. First, please believe your test results. It is unlikely that your partner had HIV- very few commercial sex workers do, particularly high end ones. Further, despite the misinformation so prevalent on the internet, there is no meaningful risk of HIV from receipt or giving oral sex. Putting this together with a negative HIV test at both 3 an 8 months following event, there is simply no conceivable way that you acquire HIV through the exposure you describe. I say this with complete confidence.
Second, your oral ulcers are not a sign of HIV. While persons with HIV do have oral ulcers these are severe and troublesome only when the isease is advanced an has been present for years. Your ulcers may or may not be HSV-1. they could also be "aphous ulcers", common ulcerations which occur within the oral cavity of unknown origin. If the ulcerations are only inside the mouth, I suspect they are more likely to be aphous ulcers than HSV-1. Aphous ulcers are more common when person are under stress and I believe that taking NSAIDs may increase their frequency as well. Either way, I am confident they o not reflect HIV infection.
I urge you not to worry further about HIV. There is really no need for concern an no need for further testing.
I hope my comment is reassuring. It is intended to be. EWH
Thank you very much. Yes they are entirely inside the mouth and usually small, going away quickly but annoying and painful!! They are also not the biggest deal as long as I don't have bigger things to worry about. I thank you for your comments and for putting my mind at ease.
Your additional description souns more an more like aphous ulcers. Please do not worry about them or about HIV based on the exposure you have mentioned. EWH