Re: Shoulder pain with deep breaths
It is possible that stress of lack of sleep can cause such pains however it is best to visit your doctor to get it checked to be sure it's nothing serious. If it were just one shoulder and not both it could be things like mild arthritis, bursitis and the like. But seeing it is two it's pretty uncommon that both would do that at the same time.
Have you done any heavy lifting lately? It's possible that that could cause it as well.
Either way if it continues definately get it looked at.