Lately, I ve been feeling very tired and sleeping very unusual hours. Yesturday I slept for a total of sixteen hours and when i woke up I still felt the need to go to sleep. On top of that, in the middle of the night I get sharp pains in my knees that wake me up. My hands have been getting numb as well. Overall my body constantly aches, I ve got mild headaches and sometimes I don t even want to get out of bed. What could possibly be wrong? It doesn t seem normal that I would ache constantly and feel the need to sleep all the time, even when I ve gotten plenty of rest.