HMMM for the first time in a long time I ?? CF testing here. I will say that if in doubt keep pushing, BUT I also can say that my daughter (no CF) had 2 bouts of strep & 2 bouts of uncontrolled fevers within a 6 week span this year. In addition she has bad seasonal allergies that often lead to her getting sick. She hasnt been dx with asmtha since most of her problems are in the head (she is her mothers daugher LOL) and havent reached her chest chronically. My daughter has always been the one to get the viral things more then bacterial. Like I said if in doubt push for additional testing. I always find it difficult when there is no digestive issues since that is what my whole dx was based on. I have limited exposure/knowledge of sinus issues with CF. Good Luck & let us know.