Dear friend, welcome to HCM.
are you sure you have GERD?
has an enoscopy/ OGDscopy been done?
if yes, was there any gastic obstruction?
GERD alone won't produce visible peristalsis/ churning movements. the has to be stomach outlet obstruction or things like that.
I think you should tell me about it in details or get evaluated to rule out other causes.
Good luck and pl. keep me posted. continue Zinetac
tablets 3 times a day till then.