as per your description it may be a case of cervical spondylosis
and initial stage of frozen shoulder
.normally toothache type of pain is the characteristic of frozen shoulder.arm and hand pain
is due to cervical problem and it is radiation
type of symptoms.as you are already got benefit from therapy earlier then you can go to physiotherapist first.if they are saying it is within their domain they will take care of it and remember frozen shoulder is 100 % curable.its not due to vascular blockage of artery.