Here its good that there is no much issue showing in your
MRI,
ct scan report, as well your blood report is also normal.
But since pain is there that means some where some thing in wrong. I get many patient like this kind of problem since I am a physio. And my general observation is most of this are not maintaining good posture while working, as well this all patient they have never done any exercise for spine.
And in your case also I suggest you to consult physiotherapist with all your report and take guideline on work related posture, what are the right posture to work in sitting, standing etc. As well take a complete exercise program for improving strength and stamina of your spine.
Few basic things while sitting and working is:
Make use of back rest complitly that means lean back complete and work keeping your chair as close as possible to your desk, then Dont bend your back or Dont mibe your neck while working on computer just to see the screen. Instead of that correct the screen to suit your eye sight level, Dont bend your knee beyond 90 degree in chair and maintain it beyond it. Instead of that keep it little straight or fold and keep stretching every 15-30 minutes to stretch the nerves and soft tissues.,
Twist your back to each side on chair or in standing every 30 minutes. Dont sit for long continuous ( not advice for more then 1 hour ).
Rest of the detail discussion you can do it with physio when you consult. Because it will be difficult for you to understand every thing here.
Follow all above advice and you will be fine.
Take care.