Yes, I've been told that's my likely diagnosis after my pH monitoring was shamefully normal! It was also described as "irritable bowel of the upper bowel" and "hypersensitive oesophagus".
Since that bombshell I've switched to Zantac. Also been trying Iberogast as that has been shown in trials to be helpful with hypersensitivity issues.
I was also referred to a GI physician who has a special interest in this but my appointment has been knocked back twice by the hospital (NHS). Quite likely to get offered low dose antidepressants as a treatment, but I'm not keen on that. Am holding my own on Zantac but normal life is elusive.
Basically the theory is that the nerve responses have been somehow upregulated, likely in response to actual reflux in the past, and just hasn't switched off since. The drugs can kind of reset things.
I also have a very small area of Barretts, so proof I had reflux at some point, but have been emphatically told I have no reflux at present!
Hope that helps!
GERD (3 years and counting)
Lifelong stuff: Food allergies/intolerance, eczema, asthma