I'm groggy and dazed right now, because I actually did sleep and slept hard.
I did go to the drugstore last night to buy dark chocolate, figuring at this point, it sure as heck couldn't hurt. While I was there, I talked to the pharmisist. (I have talked to 3 other pharmisists, who have all recommended a different cough suppresent,) She suggested that I was right, it wasn't my lungs, it was my sinuses dripping that caused the coughing. She suggested either Clariton or Benydril. She said the problem with Nyquil is that it had a decongestant whould make the dripping worse.
I bought the Benydril, because it makes you sleepy.
I woke up once durrning the night, after six hours and took another dose.
I slept again.
I still have no voice to speak of, but I have slept.
Thank you, all of you who offered advice and prayed for me. It worked. Thank you, thank you, thank you!