Welcome to the forum! Sorry you're experiencing severe attacks. I have never experienced anything like you described. Maybe, others who might have experinced your symtoms can offer some help. I was dx w/GERD approx 7 yrs ago, but have had symptoms for many, many yrs, including chest pain which led me to the ER.
I'm not sure if my BP was elevated on any of those occasions, and the only thing that I can think of that might attribute to it is the pain. Often times extreme pain in any part of the body could attribute to an elevated pressure. What is your dr suggesting on the issue?????
Hope you get some answers soon, take care, and once again welcome to the forum.