Gas/chest pains

Hi, for the last three months I have had a strange rumbling/ gurgling sensation in my stomach, especially when lying down. I can also feel loads of movement in my stomach. I have also been experiencing shortness of breath, and sometimes chest pains and aches in my arms. I have been to the hospital 5 times in the last three months and each time thy tell me my heart and lungs are fine and I probably just have a mixture of asthma and anxiety. However the inhaler they gave me NEVER works and I don't feel it is asthma. I am having tests done soon to check my thyroids but the gp said she thinks my thyroids are normal as there is no swelling. I have always been a panicky nervous person so I think partly it is anxiety but I don't get the strange movements in my stomach, has anyone else experienced this?