I had a follow-up with the chiropractor on Wednesday, where he said "Huh. The way you describe it now, it sounds just like a running injury," vibrated some muscles, tapped on the same bones, tapped the matching bones on the other side, tapped some bones up in the middle for good measure, and waggled my knees back and forth. The rest of the day the front of my hip hurt like crazy (although the back and side were fine). That faded a bit yesterday, and today my leg feels pretty much like a leg. It's still sore, but it feels like the kind of sore that gentle exercise, a bit of stretching, and taking it fairly easy for a few more days should make better. I took the dog out for a normal-length walk this morning and only got a bit sore towards the end of it.
I don't know if it's all the chiropractic, or if Sputnik decided to move and quit squashing the nerve, or what, but I am much happier now.