What Can I Do To Help Me Get Some Sleep

What can I do to help me get some sleep and get better? I am experiencing a dry cough, high in my lungs that will not allow me to take a deep breath. Sleeping elevated helps some. In addition, I am experiencing great fatigue an dry mouth - sometimes to the extent that my mouth sticks together. These symptoms started six days ago and has gotten progressively worse. I was hospitalized at the start of these symptoms with high blood pressure, chest pain/pressure, vomiting and sweating. 3 days later, All tests related to heart and lungs proved normal and I was released, but the cough and fatigue remain.