I've had something like that, though perhaps milder symptoms (but how do you measure something like that, especially over the Internet?) since the spring. I made a doctor appointment in September, for late December.I have been feeling like its hard to catch my breath off and on since sunday. Last night my chest felt tight.

Best of luck with your travels through the American medical system.
This is my best guess (for myself).Asthma can develop later in life, it's not just a childhood disease.