Complications of measles depend on the setting - and though it's hard to surmise about your case in particular (you were "pretty sure" you had measles) the case fatality rate is up to 4-10% in developing countries (probably due to poor nutrition, but other folks at risk include being pregnant, old, or very young) due to brain inflammation or pneumonia. In developed countries the risk is lower, and we have nice expensive ICU's to care for people in - until we don't - in my city, we were running out of ICU beds for folks with influenza pneumonia this past year.
Cherry JD. Measles virus. In: Textbook of Pediatric Infectious Diseases, 6th ed, Feigin RD, Cherry JD, Demmler-Harrison GJ, et al (Eds), Saunders, Philadelphia 2009. p.2427.
Bernstein DI, Schiff GM. Measles. In: Infectious Diseases, Gorbach SL, Bartlett JG, Blacklow NR (Eds), WB Saunders, Philadelphia 1998. p.1296.