Hello sir,
As per your discription,you are suffered from postural back pain.you need to correct your sitting posture while on work,avoid revolving chairs as bad for spine.
You can do lumbar stretching exercises for two three days followed by strengthening exercises.But i would suggest you visit in-person or consult online for physio advice for proper guidance.
Next Steps
visit a physio clinic nearby
Health Tips
take hot pack,avoid bending and do stretching exercises