I have been awakened probably 2x/week with a cough with some wheezing and with the cough is a horrible metallic taste which is painful. If I sit up and suck on a tums, eventually will go away but my throat remains sore.. It never happens during the day.
Thanks for your question on Chat Doctor. I can understand your concern. Nocturnal cough and wheezing are commonly seen in heart failure and asthma (allergy). So better to get done ECG and 2d echo to rule out heart failure. If these two are normal then no need to worry about heart diseases. Sometimes allergic asthma can also cause similar symptoms. So get done clinical examination of respiratory system, PUT (Pulmonary Function Test). You may need inhaled bronchodilators and inhaled corticosteroid (ICS). Combination of antihistamine and anti-allergic Chat Doctor.  So better to first diagnose yourself and then start appropriate treatment. Don't worry, you will be alright. Hope I have solved your query. Wish you good health. Thanks.