They want to cash in. They planned for this, remember? Long ago. They sposed to get rich(er) off this
Turn that shit OFF. Hydrate, hydrate, hydrate. That means water. At least 64 oz/day. Measure it if you dont know what that means. Drink more than that if you can, that 64 oz. Is a minimum.
Get some zinc. Mucinex (generic is cheaper) - plain old Mucinex. Around the clock. Drink more water. Mucinex will loosen the cough.
There are a bazillion other things you can do as well, but if you're limited on funds this will work. Give it a few days - at least 3. If you dont get worse stay home. If you get worse call a doc.