When DS was born with Meconium Illeus -- he had two blood tests, and a normal sweat test. The first blood test, we were told came back as inconclusive and we were told that the 2nd one came back also -- somewhere down the line his records reflected homozygous deltaf508 -- classic CF. But in the back of our minds, despite the loose stools, digestive issues... we kept thinking maybe he DIDN'T have CF. Our doctor did tell us that CFers are born with normal lungs, normal lung function, but with infections, sticky mucus -- scaring occurs... So it's important to practice good lung care -- cpt, etc. to deal with this progressive disease.
So while we were in denial about his diagnosis, we did (still do) cpt 3-4 times a day and remarked that if it was all a mistake, misdiagnosis -- he'll have the healthiest lungs in the world.
It's a tough call. We didn't have DS retested because he'd been thru so much, his iron levels were so low thru out his NICU stay that they'd discussed giving him a transfusion --- the nurses and we as parents didn't want them taking any more blood than was necessary. Our first year dealing with CF was pretty much like going thru all the stages of grief -- disbelief, anger.... eventual acceptance. It's a tough tough diagnosis, plus when your child pretty much looks healthy and you have other people questioning it -- the he/she doesn't look sick comments -- it's difficult to handle at times.
Enjoy your little girl. See what the clinic/doctor says next time you go to the clinic....