hello: The last while i get a burning feeling in the back of my nose and top of throat ( the feeling you get when you breath in cold air) when i exercise. i never used to . I use a nasal spray. I have acid reflux. the feeling starts to go right down to my stomach sometimes. I get some pain in my chest and my breathing is laboured but surprsingly it all seems to get better towards the end of my workout, And i am doing all other tests with my doctor , lung and heart. but i have feeling it is my acid reflux and i have some sinus problems. I asked my doctor for a scope test down my stomach. please, If anyone heard of these symptoms or have them let me know, suggestions and info will be appreciated. thank you