Have you tried products containing
Guaifenesin? This incredient thins secretions
and is found in Mucinex (pricey) and products like that - BUT, if you can find a generic or plain Guaifenesin, you will save tons of money. You need to drink plenty of water for Guaifenesin to work.
You may need to sleep with your head propped up temporarily, until [hopefully soon] you are well again.
Good luck. I hope you find some relief soon.