Tonight I felt a little bit better afterward than I did last time. There's still a little bit of light-headeness, but it's not bad. I'm pouring a lot of water into myself before I run, taking brief pauses during the run to drink more, and making sure that I've eaten something reasonable before going to the gym. I was able to do my full post-run stretching regimen today, a chunk of which involves bending over for about 20 seconds. Standing up from that is a pretty good way to assess how I feel.
My calves were a little bit sore today, I think from not stretching enough last time.