hello and welcome to HCM forum,
i would like to educate you that you seem to suffer from chronic headache, many causes are linked to it ,but can be ruled out only once you get your check-up.
Pounding, unilateral headache can be migraine
, but diagnosis cannot be made without without seeing you.
therefore,i would suggest you to visit you doctor, and start with the treatment accordingly.
i wish you good health.