it sounds to me like you have mono! I had mono a year ago and my throat hurt so bad i would drool rather then swallow, Mono makes you VERY tired, and opens you immune system to other illnesses like strep which is commonly accompanied by mono. A simple blood test can tell you if you have mono, your going to have to go to a doctor and get on some antibiotics to get rid of it, if money is an issue go to a free clinic in your area.
sounds like you have strep and the only real way is to cure it with a perscription but for now i would suggest alot of vapr rub on your nose and chest and drink lots of hot tea, and soup it is the best, that way you are still eating and helping your problem but be carefull not to give it to other people it is contageous. your just going to have to take the time to sleep too nyquil helps there is also numbing meds out there you can spray on your throat