I would go to the fever with those symptoms, I would be a bit concerned about a UTI or bladder infection. It would be more important to go to the doctor if you are on prednisone or any other immune suppressing drug.
It is possible it could be a lupus flare too, but the only way to know for sure would be to get some things checked out.
It is possible it could be a lupus flare too, but the only way to know for sure would be to get some things checked out.