Hi Cats
Sounds like you might have a muscular/nervous dichotomy between the thoracic inlet, i.e. the throat and area surrounded by the sternum, clavicles and spine, and the thoracic diaphragm. This is something which can be worked upon by gentle manipulation of the muscles of the throat and of the abdomen. A good osteopath should be able to help you.
If you PM me with your phone number I would be happy to discuss possible treatment with you. However, any chat must be soon as I am due to go into hospital soon for re-plumbing to try and improve the circulation to my legs.
Colyn.