I feel reeeeeallllly good

I had an analogous experience in December.

I was passing a kidney stone (don't try this at home, kids, unless you are really into adventure) and the pain medication they gave me was so effective it was frightening.

It did not reduce the pain to a tolerable level -- it absolutely, completely, 100% eliminated it. I could not tell that there was anything wrong with my body, other than experiencing a most welcome warm sleepiness.

But... I did not like being so divorced from what my poor, under-attack kidneys and uretor were trying to tell me. If I'd had more serious complications, who know's if I would have even noticed.

In the end I ended up taking half the recommended dosage at twice the recommended intervals and was able to function and still keep track of what was going on.

tanstaafl.