Keep pushing to find the answers you need. My daughter has a very rare mutation (G576A) that was identified with the Ambry full panel, but no others were identified. She had a positive sweat test, but showed pancreatic sufficiency, however she was hospitalized with an impacted bowel. That goes to show you that tests sometimes fail to yield all the answers. I would not want to wait and see for 6 months or a year. If there is a way to find out then I say do it. If it is cf then early diagnosis is the best thing and the sooner care is started the better the quality and quantity of life are for cfers. Hope this helps!! Keeping you in my thoughts.