No, testing is not needed for the exposure you describe above. You just need to let it go and you will feel much better.
I hope its all as you said and god bless you, you relieved me a big load from the shoulders.
question is, should I get tested?
is it possible that im infected from one time protected vaginal sex? NO CHANCE
are condoms 100% effective when they are intact? Yes
can anxiety/stress cause this to a sensitive stomach? YES for sure stomach issues are number 1 with anxiety.
You have nothing to worry about regarding HIV infection as you NEVER had a risk of getting infected
Hope this helps