DUring softball practice it was hard to breahte IT wasnt

Patient: DUring softball practice it was hard to breahte. IT wasnt hard but it wasnt easy. All i did was run the bases twice! After like 15 minutes or so i was still pretty hard. After that i got some water. even then it was hard. And it was only 85. which im used to. i practice usually 4 days a week and it happens almost every time! I also got a little light headed. Could it be asthma or just the heat?

Symptoms: Trouble breathing

Doctor: