I dont know if I have the flu or pnumonia! I have been sick for about 3 weeks, with a horrible cough. My chest has a rattling feel to it when I breathe, I ache all over, I constantly feel sleepy, there's this mucus that wont come up no matter how much I cough. My voice hasn't been normal since I got sick. I thought at first I was dehydrated, so I started drinking lots of water and gatorade and then I have taken almost every OTC med there is for cold, cough & flu, with absolutely NO luck! When I cough, I start gagging on thin air. It's hard to keep focus because it feels like my head is swimming in oil, and I have chills running down my body. What is wrong with me?