When I was younger, I could run a mile with a cramp at the worst, over the last 3 years I've had shortness of breath when I ran and walked more than 3 flights of stairs. Today, I was participating in a 5K, and at the 2 mi mark(a had been walking for 100 (meters) I began to run again and the shortness if breath got worse. It felt like I was trying to breathe through one of those really thin straws. I didn't think anything of it until I felt like my throat was closing and there was a plug blOcking my lungs. I was wheezing really bad and was super scared. It's hard not to panic when you cant breathe. Please let me know if this sounds like asthma and what I should do. I'm planning on seeing a doctor soon but I would appreciate some feedback from you