stayingstrong777, rest assured , all this is likely a product of your vivid imagination with a strong dose of paranoia.
A had a digital rectal exam for prostate a few years back and let me tell you, it is painful and it stings!
I think it felt sore for a couple days.
So if you are not gay and not into anal sex, you would be very red and extremely sore, when you woke up.
Lesson to be learnt though: Don't ever make an "***" of
yourself by getting drunk and losing control.
And if your anxiety has taken over to the point you're self-medicating using alcohol and other substances indiscriminately (specially on top of prescribed meds), it might be time to reconsider your choices very seriously.
Some therapy is in order, besides all the (right) things you can do on your own which can make a real difference in your life.
It sounds like I'm lecturing you, but it's actually your conscience that is doing this, lol!
Cheers,
Niko
"My boxers were completely spotless when I checked, I didn't feel any lube down there, and I didn't have any pain the following morning/day."
This is the only relevant evidence you have so if you don't know anyone who can advise about anal then try your doc or maybe find a forum dealing with it. You can take an HIV test after 6 weeks if you want to be sure.