If it makes you feel any better, pertussis isn't all that bad for people who aren't infants. I had a friend (vaxed) age 30-something who had it, and all it was was a lot of coughing, as one might expect with whooping cough. The vax wears off in a ridiculously short amount of time, too. I had a discussion on another set of forums about vaxing, and someone brought up the pertussis outbreaks where dozens of kids were dying because some of them weren't vaxed. When I looked into it, the kids who were getting the pertussis were elementary school kids, most of whom had been vaxed, and there was only one death that I could confirm.
Trying to find the positives,
Mom to Jackson, b. January 2006
and Cassandra, b. October 2011