Hi welcome to HCM... Your provisional diagnosis : 1.anxiety related chest discomfort ... 2.Bronchitis According to your history it seems to be psychiatric cause more .... As you are having feeling like empty chest ....So suspecting this ... Try to avoid stressful situation.. Yoga and exercise useful ... Anxiolytic drugs and behavioural therapy also useful... Consult psychiatrist for this. . If still cause not clear than bronchitis like infection has to be ruled out by chest x ray and spirometry .... Symptomatic management done for it by antihistaminic drug and antibiotic if needed ... Take care . Hope your concern solved ...