Hi Rosie,
Have you ever tried Bentyl. It is a drug used for spasms associated with Irritable Bowel (I have read that you have lots of burning in your stomach). We quite accidentally came to realize that this med stopped the constant abdominal burning my daughter was having. She has not been diagnosed with Irritable Bowel (she does have RSD) and never really recognized that she might be having spasms. She is now seeing her fifth g.i. specialist, but it was not until she ended up in the emergency room with a stomach virus that she was given Bentyl. Amazingly, she woke the next day feeling better than she had in months. Maybe you could ask your doctor if it might help your stomach burning and possibly your chest spasms too? Praying you find relief!!!
Jeanne