I Am Having What I Believ To Be Muscle Spasms

I am having what I believ to be muscle spasms in my right upper back, just to theleft & below my shoulder blade. I also appear to have a slight fever ( I do not have a thermometer ). Last night I took 800mg of ibuepropen. I had chills before bed Cold sweats during the night. In the morning I felt better, but symptoms are now returning ( spasms, fever and chills )