Welshwitch,
I love these forums. The situations that occur are amazing.
My personal suggestion, ( I am 46 years old with CF, and post bi lateral lung tx) ask your CF team for a doctor that is familiar with CF. You don't have to go through this all the time. Real nice to be told "your weird", I would want to tell them "No, not for someone with my medical history".
Stand up for yourself, and get the right doc. I go to a high risk pregnancy OB/GYn doctor and he knows all about CF. Also, have the OB/GYN talk to your CF team, so they can get educated...
Joanne Schum