Presumtive management would help.
I have carefully read your query and understand your concern.
As per your clinical history,your symptoms,in my opinion point to "viral pansinusitis" most likely.It cannot be migraine
But "viral meningitis"which can present with similar symptoms could not be ruled out completely with the current clinical status of yours.
A throbbing headache
at the base of the neck with radiation
to the top of the head needs further evaluation .
A non contrast CT SCAN of brain and paranasal sinuses
will help to differentiate the two quite easily and reliably.
Meanwhile i would like to start you on presumptive antibiotics like Augmentin
625 mg twice a day along with tab Sinarest thrice a day for two weeks..90% of cases resolve by this treatment protocol.
Consult your treating doctor with respect to the above mentioned drugs.
I hope this info is helpful to you.
wish you a good health.