Do i have mono? whats wrong with me?

so i started feeling weird on tuesday. its now friday, and ive had these symptoms ever since then. i have a headache that never goes away, and a sore throat that hasnt gone away. when i look down, i feel pain in my head and in the like glands on my neck. my neck and the back of my head are very sore. im also tired. but you know. im also cold. ive been taking some day and nyquil, but it has not gotten better. i dont have a fever i guess...but im very confused because i feel like crap! what do i have? theres no white patches on my throat..so it couldnt be strep? how about mono? please help!