Chronic cough and hypertension in 20 year old

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I was diagnosed with bronchitis in November of 2018. After 3 rounds of steroids and antibiotics I finally got better. Once the new year came in I started getting sick again. My PCP thought it was bronchitis again, but I couldn't take anymore medications because I already had too many steroids and antibiotics. She referred me to a pulmonologist who diagnosed me with Asthma. Growing up I had childhood asthma due to being born 6 weeks early. So finding out that I had it again was a shock. I was put on singular and symbicort for 3 months. After I followed up with my pulmonologist he was concerned because the medications weren't working. I was still having chronic coughing, like a constant tickle in my throat, and shortness of breath. I can't exercise without feeling dizzy. Back in November my PCP was also worried because my BP as a 20 year old was borderline hypertension. I am on adderall and came off to see if it would improve, but nothing. Now I am just constantly coughing and having extremely high BP and HR. I have seen a cardiologist to see if this is a cardiopulmonary issue, but felt as if he didn't believe my symptoms with me being as young as I am. I had a chest x-ray, a CT scan with IV contrast, whole blood work panel done, and a PTT test that all came back normal. I am at the point where I don't know what to do and feel like no doctors believe my symptoms. I am a college student just wanting to finish my degree and exercise, but can't walk up the stairs or walk to class without being winded or disrupting lectures because I can't stop coughing. Please help. I have looked into various medical issues to try and figure out what this is. I am concerned that if I don't figure something out soon I will end up with serious repercussions. Any ideas or tips?