What's wrong with me? what are these symptoms of?

Yesterday I had a really sore throat. I thought it might be allergies because it felt like stuff was running down my throat. Last night, I made the mistake of going to my dance class, and probably made my allergies worse because my nose was really runny and stuffy (in one of my classes we did all floor work, and its pretty dusty on the ground). this morning i woke up and my throat still hurt. I fell asleep with my mouth open because my nose was so stuffed up. I went to drink some water and almost threw up. I haven't thrown up for real at all today but i had a little bit of a fever. Now my nose and throat still hurt a little bit, and every time i smell food i feel like im gong to throw up. Do I need to go to a doctor? tomorrow is my last day of school so i want to be there, but i don't want to get other kids sick for the beginning of summer. Help?