We are going through a similar thing and I was told that malnutrition could lead to an elevated sweat test score. My son has had gastro problems his whole life but have been especially bad since August with 8+ bouts of diarrhea a day. He has lost 15 lbs since August. Also asthmatic and other assorted upper respiratory problems.
I agree that the best thing you can do is get the genetic sequencing.
I agree that the best thing you can do is get the genetic sequencing.