Hello!
I understand your concern.
In my opinion this may be something more serious than a muscular contraction.
The pain you are having and the gradual increase mean that something is happening in this region. It may be a cervical or thoracal disc bulge, a
spinal tumor or an infection located in your column or un the sorrounding tissues.
The headache and
nausea may be signs of an infection. Have had fever during these days?
I would recommend you to go to the doctor , have a physical examination, a routine
blood test for infection, a cervico- thoracal
x ray, followed by a cervico- thoracal
CT scan.
Finally if these diagnosis ate ruled out further exams may be needed for gastrointestinal or heart problems.
Hope to have been helpful!
Thank you for using HCM!
Best wishes Dr.Abaz