I have read all the terrific replies, and I thought I would add my 2 cents:
maybe my experiences can help you.
First of all, just because "they" say your child has CF, DOES NOT MEAN your child will be sick.
I am 47. Yes, I have CF, and was diagnosed at 5. I am happily married (15 years), have a very full time career in the advertisng field, live on a tree farm, and house an animal rescue operation. I have been in the hospital 5 times in 47 years, and was tested 3 times, different years, because I showed no symptoms at all. I have had a terrific life, except for the doctors always telling me and my parents "not to do this," and "don't let her do that," all because "she's not going to live, and hurry up and do what ever. It was such an irritating, negative atmosphere, I finally stopped going.
And, it was, all nonsense. But, it must be said that even though I have a mild case of CF, I definitely have it, and it reared it's ugly head when I was 39. I realize now that if I had not had a brother who was born with an obstruction, prompting a series of events that would lead to the whole family being tested, I would never have been diagnosed until my late 30s. And for me, it would have been so much better.
The symptoms of my "getting a bit worse" were so unlike what was written, stated over and over, or on any symptoms list, etc. I had no idea it was CF. I could breathe just fine. Didn't take any medication. But I was exhausted all the time, and started drinking lattes instead of eating. I was going to see a regular doctor for Chronic Fatigue Syndrome. It must also be said that I only go to a Cf center every 2 years, and back then I was so angry with all the doctors, I hadn't been for 5 years. Of course, doctors are much better now than in the 60's 70's and 80s.
I tell you all this to say.....you (and the doctors) have NO IDEA what sort of child you will have, and what sort of mutation. The mutation doesn't count for much either, because it has no bearing on the severity of the disease. I've been told that I have the "classic Mutation of CF." which means nothing. I do not "match" the regular profile of a person with this mutation. But, knowing as I get older, that may change, I do specific things each day, like drink carrot/oj juice. It works!
So take heart, ask God for calmness, and relax. Remember, you can't see the future, and neither can the doctors. Focus on a healthy baby, nothing more. And whatever you do, don't let your own fear, or the doctors, limit your child's future.