It's hard to say; I have asthma and while some of the symptoms you describe sound a lot like what I experience, I would tend to think that it also may well be related to the nodule/chest pain. If your lungs are inflamed, that may be the cause of the shortness of breath.

How long have you been cycling? Has this happened to you before? Do you have any shortness of breath related to things that you can predict, i.e., allergies, cold weather, etc.? I thought for a long time that I'd just had asthma as a kid and discounted shortness of breath as an adult because it would usually go away after a couple of hours or a couple of days, whereas it was much more severe when I was a kid.

I have never experienced asthma-related chest pain, though after one bad bout of asthma when I was in Europe with no meds (I didn't really think I had asthma...) I got pneumonia. Then I had chest pain. But to me chest pain is always a sign that something else is going on. Normally I just feel like I have a huge rubber band around my chest, wheeze and cough a lot.

I think you should explain all of your symptoms to your Dr.; My asthma definitely worsened after the pneumonia episode, but it is something that I've always had to one degree or another.

Anne