So I just got back from the docs [noon, yesterday]. His diagnosis was right in line with mine (hey! he must read Wikipedia too!). Probably not a fully-herniated disk, but an irritated/swollen/protruding one that's pissing-off a nearby nerve. I got some Hydrocodone+Acetaminophen (AKA Vicodin. Yay narcotics!) and some steroid anti-inflammatory stuff. Supposed to use both for the next 9 days and see where things stand. The doc took a bunch of x-rays, too. He should have the results from them by the end of the week and get back to me if he sees anything scary. If he does, then we'll alter plans at that point.
The Hydrocodone is magically-good. Pop two of those babies and the back and arm pain are quashed for hours (while the warm-tingly-I-really-shouldn't-be-driving-like-this feeling takes over my body). It's a nice change over the last ~10 days. I was finally able to get a good, uninterrupted sleep last night, laying (lying? I never could conjugate that verb) in whatever position I wanted. For the entire week+ prior, I could only lay in one position, on my left side, arms crossed in front of me. If I'd try to roll over in my sleep in the middle of the night, I was jolted awake by the pain. No more with Mr Hydrocodone. Thank you modern medicine!