Carpal tunnel type of symptoms stopped with less typing. Then deadline, and cramping in middle of hand and ache up deltoid to shoulder. Related?

Look at posture. When one experiences pain in body part, compensatory activities may place stress on associated joints, muscles, and nerves. Of course it is possible you could have an entirely different problem known as a "double crush" syndrome in which a shoulder or neck problem is also to blame.
Very likely yes. Carpal tunnel syndrome typically causes burning pain, tingling and numbness in the distribution of the median nerve which provides sensation to the palm side of the thumb, index, middle fingers, as well as the inside half of the ring finger. The pain can radiate up the center of the forearm, sometimes as far as the shoulder.