Welcome to HCM,
You have chronic headache with little response to medicines, I am sure you must have been investigated for any significant pathology,if pain is not subsiding as it can have many dimensions.
Headache may have many causes so it is better to know the cause first and treat it accordingly.
If is not responding to medicines it is possible that it is tension headache
or even masked depression
is the cause of pain.Please visit pain clinic.
If you are sleeping a lot your headache must be evaluated on all organic possibilities and then different modalities in combination will suit you and , you will improve soon.
Do not worry and