Thanks for posting your query.
Since how many days are you suffering from fever?
If all other investigations were normal, then you should again go for repeat widal test
. Rising titre in widal test is more important.
You should also go for urine examination, chest x ray
You should also consult with physician.
If all other investigations are normal then there may be chances of viral infection.
You should also take muscle relaxants, multivitamins and antibiotics (for secondary bacterial infection).
Dr. Mayank Bhargava