Hello and welcome to HealingWell. I am sorry you not receiving any relief from the Nexium I would not hesitate to make an appointment with a Gastroenterologist. Give him/her your history and current problems. Tell him/her you want the following testing done:
Stomach emptying test
Also I would take a look at your diet. You may want to read through this thread about the Koufman Low Acid Diet:
~~Kitt~~Moderator: Anxiety, Osteoarthritis,
GERD/Heartburn and Heart/Cardiovascular Disease. www.healingwell.com"only as high as I reach can I grow, only as far as I seek can I go, only as deep as I look can I see, only as much as I dream can I be"