Was woken up with sharp pain in right shoulder blade and neck. what could cause something like this? (haven't been in any accidents)

Spasm, nerve?: It sounds like you may have a pinched nerve or some muscle spasm these symptoms can occur without specific i juries try some ice and nsaids see your md if symptoms persist.

It can be one of : Several possibilities ranging from: muscular, cervical disc origin, shoulder issue, even gi, respiratory and cardiac etiology. If it does not resolve or worsens, see your doctor.