Adruiz, welcome to HealingWell
You have my sympathy. I've had a lot of the same symptoms your describe and I know it's not easy. I never had shortness of breath before I got Gerd in May of this year and have been prescribed Ventolin which I only use when absolutely necessary as it makes my heart palpitate and I feel really jittery for a couple of hours after using it. I had an endoscopy which shows I have a small hernia. Had an ultrasound scan to check bile ducts and that was fine. I also had a Ph & Manometry test which to my amazement was normal. I have no had a barium swallow and would be interested in seeing what that might come up with.
Despite my "normal" PH score the consultant did refer me on to a surgeon for assessment, maybe because he doesn't know what else to do for me.
I am also thinking of asking my doctor to refer me to an ENT specialist.
Keep posting and let us know how you get on and if you do the ph/manometry test it would be interesting to know what your results are.
Take care now.