I have had a headache for the past day, in the back of my head. My neck is stiff as well on the right side and I am experiencing right shoulder pain - like I have trouble lifting my right arm above my head. I have taken Advil, Aleve, and a prescription percocet. I have been having alot of joint pain (knees, ankles) and as the day progresses - and as my body gets tired - it seems to make this pain worse. In addition, my ankles are swollen.