drkside,
Controlling acid reflux by diet and care after eating (-- staying upright after eating, not exercising after eating or bending over, not wearing tight belts or other constricting clothes) is better for you all around.
I'm not fond of proton pump inhibitors because they reduce absorption of nutrients. They are implicated in osteoporosis, in increase in all cause dementia and severe electrolyte disturbances.
Stopping PPIs can temporarily make acid reflux worse than it was originally. I would stop. Since it is prescribed you'd be best consulting or at least informing that doctor of your decision. It would be more clarifying to have a metabolic blood panel now. But you could just wait and see if the symptoms go away without the PPI. Did you pass out before or after you began taking this medication.
You might want to see a gastroenterologist for an upper endoscopy to see if you have a hiatal hernia.