You've asked about HIV and oral sex and this type of activity previously and the answer hasn't changed since last time. Please internalize it and remember it next time you have a sexual encounter. The only ways that adults get HIV are by having unprotected and penetrating vaginal or anal intercourse or sharing IV drugs. Air inactivates the virus and saliva has enzymes in it that does as well. Between those two things, nothing you describe is a risk. Dry humping through trousers . . . no. That is an irrational fear. And you can not penetrate through trousers. Receiving oral sex is also not a risk for HIV as expressed to you now a few times. And since you say 5 months ago, this is the same exposure you wrote of before? Your advice has not changed. The sore on your tongue is not related to HIV. Please talk to someone about anxiety as it is making you think in circles. You had zero risk no matter how many times you ask the same questions.
Frottage with or without clothing is not how hiv is transmitted. No penetration means no risk. Also, recent studies show that there has never been evident studies that prove oral sex transmits the virus. Saliva inactivates the virus. With sores or not, oral sex does not transmit hiv. Avoid unprotected vaginal/anal sex and use of drug injecting needles are ways to prevent hiv.