When you go to Spain, I noticed you pay upfront to see a doctor, then pay for whatever medicine etc.. from then on. Then when you get back home, you reclaim it back.
About 15 years ago, the wife at the time had an upset stomach when we were in Spain. Once we found out how healthcare costs and reclaiming the money back etc.. worked, we waited a couple of days and she was fine.
So after that, all I can say to folk who travel, read the small print and take a credit card with a good credit level on it. My credit limit on my credit card is £13,200.