I saw this comment before my reply above. It really doesn't make any significant difference in my assessment or advice.
I'll try to help. You really don't have any serious worries here. Although nobody can guarantee you could not have caught HIV, almost certainly you did not. If your partner had HIV, the risk of catching it from a single episode of fellatio (for the oral partner, if the penile partner is infected) is roughly once for every 10,000 exposures. That's equivalent to giving a ** to infected parrtners once a day for 27 years and perhaps still not being infected. While I can imagine that having a burned roof of the mouth might increase the risk, what if it doubled the risk? Or even increased it ten-fold? The odds remain overwhelmingly in your favor.
Of course, kissing and mutual masturbation make no additional difference. Those are zero risk activities, for all practical purposes.
Most likely you already know the most important take-home message here: for gay/bi men, there is no excuse for proceeding with sex of any kind without first asking about and sharing one's own HIV status, and avoiding sex (even when safe sex is planned) with those who are positive or who hem and haw, without direct and forthright replies.
Nevertheless, your risk in this situation is very low, and you really don't need testing on account of this event. But of course feel free to do that if you will sleep better knowing your HIV test is negative.
I hope this helps calm your nerves. Best wishes-- HHH, MD
Sorry doctor, I meant to say "I am also worried because additionally , I had some soup a few hours before that and the roof of my mouth and my tongue were burned from the hot soup a few hours before"