Update

I try not to dwell on my health situation in this blog, but since I opened a can of worms with my post from Wednesday, I thought I should bring that incident to a conclusion. Long story short, I passed out while visiting Casa Mila, probably the result of a combination of factors including dehydration, low blood pressure, fatigue, and time differences, and pushing harder that this ol' body should be. I still didn't feel up to par the next morning as we started touring the Joan Miro Museum, so we decided to err on the side of caution and return home. I went to my primary care physician yesterday, and I am fine. 
End of that story.