One thing that I suggest you try as well is remedial or sports massage for your neck, shoulders and back.
These muscles when tight will pull down your neck and scalp and cause the strongest pain. I thought i had ON but it was just very tight muscles.
Relieved by massage immediately, cured by taking magnesium oil daily.
With the stress that you are under, and your working conditions, your muscles will be in a bad way-there is no way they cannot be.
So regular massage is definitely called for, and you would do well to start stretching and loosening up movements every 30 minutes at work.
Computer work is producing a whole new class of disabilities.
I worked through my pain for years, and at the end was completely unable to work 2 days out of 5. The remaining days were a mixture of work, stop for pain to ease, work another few minutes, stop, and so on. I always worked with a strong burn in my right shoulder/ neck area. Painkillers didn't make a dent.
I have completely ruined my shoulder and neck from not looking after my muscles and posture.
Be very afraid!!!