That pain is A1, Prima Fascia TMS indicator...and yes , most of us have had that and it is TMS.
If you read Sarno's Original material he sighted tenderness in that muscle as a Diagnostic criteria For TMS...meaning if someone didn't have pain there, it probably wasn't TMS!
He changed this later, but yes, had it for years and it is TMS..Every morning pulling out of my driveway, I had to turn my whole body as my TRAPEZIUS was so tender and spasmed I couldn't turn very well.