Funny you should mention your stiff neck. Not too long ago I wrote about having a stiff neck after my first BCG treatment. I assumed at that time it was due to sitting in the same position for over 8 hours, head turned slightly as I watched television. This while I drank copious amounts of water in an effort to flush the BCG out. The stiff neck was limited to the first BCG treatment I'm happy to report.
Your topic reminds me of a guy who got a stiff neck when a viagra tablet that he swallowed got stuck momentarily in his throat.
You recently spoke of difficulty sleeping. Is this still an issue for you?
Finally, I assume your 6 hour drive home is from MSK. Do you remain at the hospital for the first 2 hours after instillation, expel the BCG, then drive home? Just wondering what that process looks like for you as I briefly considered MSK as an option for BCG treatment.