Could it be something other than CF? I don't know... I'm sure it is entirely possible. What most of us know on this board is it certainly sounds like it could be CF, because of the symptoms.
Having a lack of diarrhea is not that big of a deal, as many people with CF are pancreatic sufficient and so that by itself would not indicate that it is not CF.
Having a normal sweat test is also something that many people with CF have experienced first hand. Sweat tests are a good tool when they are high and clearly positive. When they are lower or borderline but symptoms persist, the only way to go is the genetic testing or nasal potential difference testing.
Hang in there, it sounds like you have finally found the right doctor - count it as a blessing that he has ordered a full genetic testing, that can be a huge battle for many parents, especially after a lower sweat test number.
Having a lack of diarrhea is not that big of a deal, as many people with CF are pancreatic sufficient and so that by itself would not indicate that it is not CF.
Having a normal sweat test is also something that many people with CF have experienced first hand. Sweat tests are a good tool when they are high and clearly positive. When they are lower or borderline but symptoms persist, the only way to go is the genetic testing or nasal potential difference testing.
Hang in there, it sounds like you have finally found the right doctor - count it as a blessing that he has ordered a full genetic testing, that can be a huge battle for many parents, especially after a lower sweat test number.