EMERGANCY: Inflamed swollen sore throat, mucus, chest congestion, and slight cough. HELP!?

So like I said, I have an Inflamed swollen sore throat, mucus, chest congestion, and a slight cough. I don't know what this is, but I need to get better quick! I have some pretty big things coming up and I can not be sick. I really need help on getting rid of this. Also, I had a head ache too. I took pain... show more So like I said, I have an Inflamed swollen sore throat, mucus, chest congestion, and a slight cough. I don't know what this is, but I need to get better quick! I have some pretty big things coming up and I can not be sick. I really need help on getting rid of this. Also, I had a head ache too. I took pain reliever for the head ache, and I took Diabetic Tessin? It tasted like ****! I thought I was gonna puck, TIP: never take Diabetic Tessin. EW. So anyway please help me what do I need to do to get better quick!! I have a flight tomorrow, is this dangerous to fly under this condition?? PLEASE HELP :(
Update: Also it kind of hurts when I swallow
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