My 10 year old CF'er has chest pains like that a lot... Never with a fever or anything but extreme chest pains and saying she can't hardly breath. She says it hurts when she tries to breath in. I have talked to the dr about it several times but they have no explaination. It has been happening for about a year now. It is random and happens maybe once or twice a month...it lasts for maybe 10-15 mintues each time. I can tell it really scares her but I have no idea what else to do. She is really healthy as far as her lungs go and has no regular cough at all. In fact, she's never had a lung infection (may sinsus surgeries but that's all)... I hope you figure something out... and if you do, please let me know!