How do I know if I have exercise induced asthma?

I have some symptoms but im genuinely confused if I do or dont. I can do strength exercises just fine for as long as I want, I have never had an asthma attack, but if I run or do some kind of endurance exercise for more then two minutes I get real bad burning in what feels like my lungs and can't breath, but if I wait it out for usually 20 - 30 minutes I'm fine again. I also have a bmi of 27 (actively working on losing weight) and live at an elevation of 7000. I know someone's gonna say to go the doctor but I can't. Need advice