I would not get this update. I might get the DT, but I wouldn't go with pertussis. It doesn't work - immunity wears off, and the disease may be evolving to be resistant to the vaccine. I'm not sure about DT myself, so I can't give you any thoughts on that. I can tell you that it's very difficult to get tetanus. I've done a lot of research on that. I don't think there's any harm in delaying until you've fully decided.
I hope this helps a bit!
Mom to Jackson, b. January 2006
and Cassandra, b. October 2011