Freddie - so sorry about your foot! Bad stuff, indeed.
I agree - St. Emilion's underground area is neat but the guides, to quote a friend of mine: "My, how they do go on!!". When I saw them locking us in like jailers, I made a break for it and had a cup of coffee instead.
Don't forget elevation and periodic icing in addition to the ibuprofen.
Cheers, Anne