These drugs are commonly used to help prevent cardiac conditions like high blood pressure (hypertension), atrial fibrillation
, angina, myocardial infarction (a heart attack), and ventricular arrhythmias. Beta blockers will control your heart rate, blood pressure, and disarythmias. The side effects of beta blockers are BROCHOSPASM! They make you wheeze. So you see here, one cancels the other out.
It appears this is whats happening to you.