This certified internist since 1974, who has had over 1/4 million adult patient-encounters, 'senses' heart
As I have said, it is in the nuances and subtleties of the history by a experienced clinician wherein lies the answer to 'what is it, doc?'.
I know nothing about you, but 'tight' and 'both sides of neck' worries me. See an internist or cardiologist...Now.