Yesterday around 4 p.m. started feeling ill, them two hours later had a horrible headache, body aches, chills, didn't take my temperature cause I don't have a thermometer but I'm pretty sure I had a high fever I also felt weak and my eyes felt heavy and hot, now I don't really have so symtoms but I have a sore throat and it is painful to swallow, and my nose is very dry as well. What can this be?