I'm dealing with some breathing issues, like shortness of breath, and it's been more than 10 years. I've gone to various doctors, and they said it's allergies. So, I went to see a pulmonologist. They suggested I do FENO and PFT tests. My FENO result came back as 19 ppb, and PFT was normal. They gave me a Foracart 200 inhaler and some meds for allergies, but it's been five days and I haven't noticed a difference. Should I be worried, or could this take more time? What should I do next?