this is the pain due to nerve compression at the neck or cervical area.the pain occurs wherever the compressed muscle supplies.As you are a CA , so it can be one of the reason. the sitting ,table work and work on PC creates the problem and worsen it.
Next Steps
go for physitherapy..ultrasonic therapy for healing,tens for muscle relaxation and heat therapy for reducing inflammation may required+cervical traction if required . take rest. then the exercises are to be done and very much important.
Health Tips
For neck-at home..rest+hot water fomentation+application of pain killer gel..keep your neck straight as much as possible,avoid forward neckbending, weight lifting, cold exposure ,long travelling or driving, no prolonged walking/sitting.