Could I have CF?

I've had what has been diagnosed as horrible allergies my entire life. My nose is completely clogged 365 days a year, to the point where I basically can't breathe through it. What's worse is I have this horrible post nasal drip. It's so thick and copious that I feel like I am constantly choking. I'm coughing and sniffling literally every second of every day. Although I do exercise, I have a hard time breathing when I run. I often feel like I can't breathe deeply enough. I feel like I constantly have a sinus infection, I've had probably 2-3 a year for as long as I can remember. I've had my lung capacity tested before to see if I had asthma, and the doctors said it was fine. I've tried literally everything to reduce my symptoms; nothing I've tried has made any difference at all. I take antihistamines every day but they don't help. I did allergy shots for three years, at which point my allergist gave up because they weren't helping me. After the shots, I seemed to be allergic to fewer things according to my allergy tests, but my symptoms just get worse and worse. My doctors have basically said they don't know what the issue is, and that there's nothing they can do to help me. In addition, I also have digestive issues. I came to the conclusion that I had celiac disease (even though IgA blood test was negative) so I went off gluten, which seemed to help for several months. But in the last month or so, my digestive symptoms (painful bloating, constipation, etc.) have started to ...
Source: Cystic Fibrosis Newly Diagnosed Forum - Category: Respiratory Medicine Authors: Tags: Newly Diagnosed Source Type: forums