I'll throw in my 2 cents worth.
For over 25 years, while working with computers, I had the most awful debilitating headaches that nothing was able to relieve.
Massage, medication, injections, chiro.

A new pain doctor suggested that tight back and neck muscles were pulling on my neck and scalp, and causing the headaches.
Remedial massage was suggested and I found immediate relief.
Not a cure, but it helped me cope.
I now take magnesium oil for my muscles and don't need massage nearly so often.
Something to consider.
I was on maximum dose tramadol at this time as I was still a bit headachy and read about rebound headaches. So I stopped immediately -not recommended-and took a slow release paracetamol instead.
Headaches went. So I think I was getting headaches from the Tramadol.
Speak to your GP before changing meds though as if you are dependent on them you may suffer a reaction.
I had just twitchy legs for 2 days, so was lucky.
None of these things may help you, but it pays to keep an open mind and try different things.