Numbness is a symptom that one of your nerve is getting impinged somewhere due to disc bulge or inflammation.
Better to get checked from a good physiotherapist.
Next Steps
take ultrasound a n low TENS along the nerve root.
only exercises might strain the muscles further, better to take modality treatment before exercises.
Health Tips
follow the ergonomic advices and do desk stretches when working on system for long periods of time.