Seems as though you have an infection. The inflamed throat could be from swollen tonsils. Suck on ice and put ice packs on your neck. Headache, rub a raw onion on your forehead, turn off all lights, lie down or find a way to be comfortable. Cough, mucus, chest congestion ... take steam. Go into your bathroom, turn the shower on HOT and stand there (not under the water, don't want to get burnt) and breathe in the steam. It'll make you cough worse and cough all the mucus up, but mayhap you can get rid of most of it. Stay calm, breathe deep as you can. Put your shoulders back and sit up straight to open your diaphragm. Keep your head up high to elevate your neck. If it gets to where you really can't breathe, do call for an ambulance. Don't want to pass out and not wake up, yeh? Hope you feel better and maybe call the airport to ask about their safety policies for sickness.