Breathing

I ran a 60 mile training run a month ago & a 50K a week later. I had a little trouble breathing for days after both. Since then, I've done a couple of tempo runs & fartleks with the team & afterwards, feel awful for a day. I think I might have bronchitis or some kind of exercise-induced asthma. The doctor I went to is looking at long-term things, but I just want to breathe now. That's the only thing that has me scared about the 100 miler NEXT WEEK. Yeah, next week. I have a Z-Pack now. Maybe that will help out. In the past couple of weeks, I've had several blood tests done, X Rays, an EKG & an Echocardiogram. I feel like I just need an inhaler.