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You had fever
1 month back and it was treated, see every fever is not typhoid
and if the cause is typhoid then treatment with antibiotic for three days is not sufficient, hence it is possible to have relapse or you may be having fever because of some other cause.
The widal test
is commonly performed but many false positive reports are possible.
when test is repeated and shows rising titre then only it is diagnostic and even use of antibiotic changes result.
If you have bodyache and fever please vist your doctor and depending on cause of fever take proper treatment and you will improve in few days.