Just a quick update:
I took Nexium 40mg for 40 days (30-day prescription + 10-day sample) and all symptoms basically went away. Doctor took me off it at end of 30-days and asked me to take Prilosec OTC for a month or so to see if anything came back.
For the first 2 weeks, all went well...no heartburn and only a few "flutters." I'm sorry to report that for weeks 3 & 4, I've slowly been experiencing a recurrence of my original symptoms...more frequent esophageal "flutters", a feeling of something in my throat occasionally, slight chest pains if the wrong food is eaten, etc. Apparently, I needed to follow the longer, 2-month regimen of Nexium or go on it "permanently."
Will return to the doctor next month and request more prescription strength medicine.