Hiatus Herna is an ongoing situation, and they can operate laparoscopically [sp] and relieve the reflux that is characteristic of this condition. It is perfectly controllable with acid reduction pills like Losec or Zantac, and a bit of dietary caution. Ulcers are a different thing, and these days most ulcers are cured by massive doses of antibiotics. They used to cut lumps out of people's stomach for years, then discovered that in most cases they can cure it with pills. So all in all nothing too much to worry about, sorry that it had to catch up with you in Madeira, and hope it's not an ill omen, as I'm going there myself in May for a short break.
Get better soon.
John