Hello and thank you for your post on e health forum.
From the history provided it seems that you might be having a condition called Diffuse esophageal spasm, which is a motility disorder of the esophagus.
This has the classic presentation of a retrosternal chest pain , difficulty swallowing and severe distressing symptoms.
For confirmation, you might undergo a motility studies of the esophagus, which will give a definitive diagnosis.
The treatment of this condition includes a prescription medication which relaxes the muscles of the esophagus and hence relieves the spasm and hence the symptoms.
I hope this helps.