Upper chest pain after running a few laps. Allergy season. Never diagnosed with asthma. Normal ECG test from last year.?

Chest pain. See your doctor immediately. If continues go to emergency room. Exertionsl chest pain can reflect underlying coronary disease or possibly asthma with exertion. Either way should be evaluated asap.
Potentially serious. Exertional chest discomfort is potentially a red flag. If you're >40 or diabetic at any age, or smoke or have other risk factors, your symptom could be due to heart disease. A normal ECG last year was helpful information last year but has no bearing on the present. You should refrain from further strenuous exertion until you've been examined by your doctor.