Hi,
Thanks for writing in.
Sudden severe pain on one side of the head with ear ache raises the suspicion of severe ear infection. I would suggest you get an ENT exam done to rule out ear infections. Since your CT scan is clear and migraine meds are not helping you, other possibilities like neuralgias and cluster headaches also need to be kept in mind.
Is it a dull ache or sharp stabbing one?
I would just see your general physician and get a referral for a neurologist. i have been going thru something much similar thing for 3 months and i have been on 4 diff. meds and none of them worked. but dont lose faith just go to the doctor something will end up working.