I have this and was told by my doc's that it was fibro. Maybe you could do some reading on this just to get a better idea.
I know the difference betwen my lupus pain and fibro pain, so I am lucky in that way. If I am certain it is a lupus problem then I know I can increase my medications and rest more, etc. to cope with the flare.
If it is fibro, then I know I must do gentle stretching exercises and apply heat to the affected area. Also not using my pc helps enormously. Only my personal way of dealing with fibro.