These weird sensations felt in the fingertips can be due to having a high blood pressure (impaired blood circulation).
Also, having tingling sensations along with raising blood pressure, is very suggestive for panic attack.
Acctually, hypertensive people are more prone to develop panic attacks, when 'Fight or flight' response raises blood pressure.
The fact that you are experiencing this only at your work, raises the suspicion for panic attack even more (panic attack triggered by certain situations).
Think about your stress level on work.
Best wishes!
Marija