Hello,
I have studied your case.
First possibility as per presentation of your symptoms is
migraine.
Migraine usually involves half part of your head and associated with
nausea.
Check your blood pressure also.
Another possibility of complain related
sinusitis.Inflammation of sinus leads to headache.
Routine blood investigation like
complete blood count, ESR, CRP, MRI brain will be useful.
Blood investigations are useful tool for screening but there are nonspecific tools available.
Management will depend on clinical examination and investigation reports .Plan will go like this, if headache is of migraine variety
medications for migraine like sumatriptans can started consulting your doctor.
Some medication like
analgesic [paracetemol] will reduce pain
Hope this answers your query. If you have additional questions or follow up queries then please do not hesitate in writing to us. I will be happy to answer your queries.
Wishing you good health.
Take care.