Welcome on hcm.
Hereby I am going to help you.
There may be so many causes of acute headache you have.
It must be investigated thoroughly.
Get following investigation done and report to me.
1. Blood for TLC
2. Urine Complete.
A.P., Lateral and Oblique view.
MRI of Skull.
Time been, considering it a migraine you take over the counter analgesic.