Today I went on a 56 mile ride with the team from my cycling group. It was a tempo ride around 19 to 22 miles an hour with lots of hills. I'm not use to hills, but have done them before, about 50 miles at the same speeds. Anyway, I had a horrible day, I got dropped and had to ride some of it by myself. I felt miserable yesterday and should have just taken the day off. During the ride I noticed I was having difficulty breathing but kept going. The end of the ride finished with a really steep and long hill. I pulled into the rangers station and stopped to talk to some other riders. All of a sudden my lungs felt like they were closing up, it was like breathing through a straw but a friend had me sit down and it went away within in a minute. My question is, does this sound like asthma or do you think I had an anxiety attack from getting dropped. I didn't feel anxious or anything but I've heard that anxiety attacks will make you feel like you can't breathe.