I agree. Test as much as you can. The symptoms sound so much like CF. We only had my son tested because we found out we were carriers during pregnancy and his newborn screen came back high. He still has few symptoms. No greasy stools (although very stinky), he is 95%tile weight, and has fought off colds like a champ. However, as an infant, he would wake up screaming and was VERY hard to console while awake. Looking back at things, that discomfort should have been addressed by his ped way better (knowing we were cf carriers). We were actually given an abdominal pain reliever. What he really needed was enzymes. Good luck!