I would say that this and from your post that is closed now that anxiety is playing a role in your constant questioning. By using a condom, you protected yourself from HIV. There is nothing to add to that. If you can't accept that, then you should speak to your doctor about anxiety.
Sex with condom which dint failed,tear apart totally during intercourse means it had done its job to protect you from hiv should your other partner is infected.
Theres never 100 % since a condom can failed and which is also very rare,and if your condom dint failed theres no point worrying about hiv.