Please help! Possibe CF? Sweat test needed after rectal prolapse in 2 1/2 year old

Hello, This is my very first time posting here. I never thought I would find myself posing questions in regard to CF and my children, as I thought any fear of CF would have been completely put to rest by my prenatal testing and newborn screening. Apparently, as I am learning, this is not always the case. I just got back a little while ago from an over night stay at a children's hospital following my daughter's first experience with rectal prolapse. After speaking with the gastroenterologist at the end of her 24 hour observation period, I learned that it is protocol to send children her age with rectal prolapse for a sweat test for CF. He sort of brushed it off, and I brushed it off as well. Then, of course, I came home and googled it. I am currently quite terrified, because it seems she may have some symptoms of CF, and I am in desperate need of input. Here is a little background, please tell me what you think: -She is 2 years and 7 months old. She tested negative for CF during new born screening, and I also tested negative for whatever gene mutations are tested for during early pregnancy- in each of my three pregnancies. She is my middle child, I also have two sons ages almost 4 years old and 10 months old. -She has had severe constipation with abdominal pain for 9+ months. Her stool is often the size of a baseball and hard as a rock. Other times it is very soft, but no less painful for her to pass. -She only had one rectal prolapse, which took place yesterday ...
Source: Cystic Fibrosis Newly Diagnosed Forum - Category: Respiratory Medicine Authors: Tags: Newly Diagnosed Source Type: forums