Thanks for the query.
You have described that she has pain all over the body.It is better you complete blood tests for her and a detailed physical evaluation too.Tests like complete blood profile, RA test,renal and lipid profile
, thyroid test.If she has fever arthritis
due to which she has body ache
needs to be seen.Give her mild pain killers for now and TENS therapy from a physiotherapist till blood tests are done.