Have you tried to elevate your head while sleeping. Try to drink lots of water and for godness sakes; get to the doc for some cough meds, they'll give you the good stuff so that you can sleep. Good Luck
I started with the annoying cough and it even hurts a little when I get started. I run my $19.99 Walgreens vaporizer, it does seem to help - heat is so drying. Everything is more noticeable when you are laying there trying to fall asleep. When I have mentioned this cough to anyone I keep hearing "everybody seems to have that!" My husband says there are people he works with who have this cough thing and it lingers on. The one thing I DO keep hearing is that it takes a long time to go away. Cough medicines, antibiotics are being used - so be wise - but be patient.
If you hear of anything that really helps, let me know!