What Causes A Sore Throat And Body Ache?

Woke up a couple days ago with a sore throat, at the end of day 2 i just felt horrible. Body aches, head aches, sore throat, i just wanted to sleep. Day 3 morning felt fine, took dayquil when i woke up and went about my day. Went to cedar point that same day and not until 2 oclock is when i really started not feeling well. I could feel everything just getting worse. I found a bench and slept for about 20 minutes. I woke up with a high fever, cold sweats, and it felt like i had just gotten hit by a car. I was given 800 mg of ibuprofen which knocked my fever right out but then I was taken to a first aid center where they took my temp. Which was normal and i slept for about an hour and a half. I woke up feeling 100% and went back to the park riding all the rides. When i woke up this morning which was at 4:00 this evening, my body aches were back, head hurts, right ear hurts, throat still hurts, i can feel my right tonsil engorged and when i looked in the mirror at the back of my throat the right side is completely swollen and is covered in white stuff. What is going on??