Muscle Cramp

Hey I am not sure if it would be called a muscle cramp or what, but this never happened before.  I yawned and under my chin and a little of my neck muscles just tightend up.  It hurt so bad, but I didn't say anything I just massaged it a little.  I really haven't felt right since.  I don't know if that is a new symptom or what but I guess I should probably tell the doctor about it.  The card that they gave me yesterday said it might be 24 to 48 hours so we tomorrow I hope.  Thanks for reading...God Bless