I'm having trouble breathing when I'm lying on my back. It feels like the air gets stuck in my throat. But when I sit up and do some breathing exercises, things seem to get back to normal. This started around 8 to 10 days ago. I've also felt nauseous and had a tendency to vomit and I've been sweating for about 5 to 7 days. I don't have a fever, but I do cough continuously for about an hour or so. It got so bad that I went to the emergency room where they checked my blood pressure, breathing pulse, and body temperature. My BP was 15090. They gave me Razo, Montair, some cough syrup, and Betadine. But even after coming home, I'm still having trouble breathing when lying down and also have chest pain and a feeling of lethargy. Do you think this is serious? Can you suggest any home remedies? And when should I think about visiting the doctor again? The breathing issues are less serious than before, but I still have mild chest pain. Should I wait for about 12 days and see if it gets better before going back to the doctor?