I talked with my husband in length about this topic last night. We do not have the internet at home. I am at work now.
Cardiologist want any chest pain experienced by someone with CAD to be treated with fast acting nitro. They do not want heart disease/CAD patients to have to wonder if it is angina or GERD. So, they are put on PPIs if they have problems with GERD. This usually stops all symptoms from GERD if you are taking the correct dosage of a PPI (Nexium, prilosec, etc). Then if you have chest pain, you know it is from coronary artery disease (CAD).
In your case, your GERD or acid reflux is not relieved by your PPI. You should have an endoscopic analysis if you have not. You may have some damage to your esophagus. I hope not and you probably have had the endo.
I am sure that you are also aware that people that take PPIs do not absorb vitamin B12. B12 is broke down in the stomach by acid and absorbed in the small intestine. PPIs neutralize the acid and increases the PH of the stomach enzymes.
My husband and I have tested low on direct B12 measurement tests. We both receive B12 injections once per month. Another way to bypass the stomach, regarding absorption of B12, is through the use of sublingual B12 tablets. The B12 is directly absorbed into the blood stream.
Thanks for your kind note