Hello @chris77 and welcome to Mayo Connect. As you know, Mayo Connect cannot offer medical advice as we are not medical professionals. We are patients, like yourself, who give and receive support and encouragement.
This problem with breathing and choking sounds very uncomfortable, I'm so sorry that you are experiencing this. I have some swallowing issues that can cause a choking sensation and breathing/speech problems so I do understand just a little of the panic that you must feel when this occurs.
Just to help understand this problem a bit better and see if I can connect you with others with a similar situation, could you tell me if you have any swallowing or speech problems? What type of specialists have you seen? Have you ever seen a Gastroenterologist for an EGD?