Just a "Food" for thought - Its possible you have developed a minor ulcer in your stomach related to all the stress your under. It can cause the same sharp pain that radiates up into your shoulders, neck, back...etc. Try to avoid acid foods (tomatos, spice, orange). Have some tums on hand or even pepcid and try those for a few days and see if it doesnt help.

Healthy energies your way....Kymaro