I believe that my daughter may have CF - if not I have no idea what is wrong with her. However, her GI doctor insists that a sweat test is the most conclusive test out there. Since hers was negative he refuses to pursue further testing. I am going to try to get a second opinion - but I would like to know what the most thorough genetic test is and how much it will cost. If we do wind up having to pay out of pocket I would like to be prepared, either way I'll need to know what test to ask for. thank you for your help!