Hi!
What you have is probably Scalene Myofascial Pain Syndrome. When scalene muscle is the cause of pain, the pain is referred from neck to (either all or a combination of) chest, inner lining of scapula (shoulder bone), shoulder, posterior and lateral sides of the arm right up to the thumb and index finger. When this muscle shortens, this can press on brachial plexus (bundle of nerves and blood vessels in the armpit) and the subclavian artery and can compress or irritate these structures and cause symptoms such as abnormal sensation, cold extremity, spasms of pain, and lymphedema (swelling of lymph channels causing swelling of arm or leg), burning, tingling etc in the involved extremity. Treatment is by physiotherapy that involves indentifying the trigger points, and massaging them, and other exercises to relieve the muscle tension. Do discuss this with your doctor and get yourself examined. Take care!
Thank you for your answer! I will definitely bring this up to my doctor. Any type of answer or lead at this point is highly helpful. :)