Why do my fingers tingle?!

Stress is a normal part of our lives. It isn't necessarily good or bad. It isn't a disease. But reactions to stress can vary enormously, and some these reactions are undesirable.
The most frequent undesirable reaction is anxiety. The degree of anxiety is much more a function of the individual than the degree of stress. A person who reacts with excessive anxiety to everyday stress has a personal rather than a medical problem. The person who doesn't recognized anxiety as the problem will have difficulty solving the problem.

Anxiety, especially unrecognized anxiety, can lead to physical symptoms. The hyperventilation syndrome is such a problem. In this syndrome, a nervous oe anxious person becomes concerned about his or her breathing and feels unable to get enough air into the lungs. This is often associated with chest pain or tightness.
The sensation of being out of breath leads to over breathing and a lowering of the carbon dioxide level in the blood. The lower level of carbon dioxide brings on symptoms of numbness and tingling of the hands, and dizziness. The numbness and tingling may extend to the feet and may also be noted around the mouth. Occasionally muscle spasms may occur in the hands. See your doctor.
I hope this helps you. And good luck.