Thanks for writing to us
If cardiac cause has been rule out, it could be due to compression of nerve in cervical [neck area] spine. This leads to radiating pain
Most probable reason for your symptoms could be postural problem. You may need to take x ray
spine to see for severity of symptoms.
Some medication like methylcobalamine with muscle relaxant
will help, you can take them consulting your treating doctor.
I do hope that you have found something helpful and I will be glad to answer any further query.