hello this could be hypoglycaemia do rbs and consult physician and decide

Hello there... I understand your concern about your health condition and I appreciate that...there are many reasons for headache it may be due to increased blood pressures, migraine, cluster headache, refractive errors, meningitis,sinusitis,increased intracranial pressure, reffered pain from somewhere else... So detailed history and examination with relevant investigations is necessary... Kindly consult nearest neuro physician they will do the needful.

Consult pain physician for clinical examination  of type of headache

Probably dehydration.Take plenty of fluids,and relax.Check for blood sugar levels and hemoglobin.