Drink plenty of fluids should help & loosen up the mucus & if you have humidifier it helps a lot good luck hope u feel better soon:))
Maybe go to a walk in, try and get a prescription for amoxicillan. The cough is caused by all the mucus. I had a sinus infection, it didn't give me a cough but i had what felt like a toothache. It turned out to be a sinus infection and once i was on amoxicillan for a couple days it went away. Feel better