Sorry to make a second post; what I'm about to mention doesn't really fit in my other post, so I thought I'd post it here.
After speaking with my specialist recently I've finally got a manometry and pH impedance study on the way. I already had the Restech probe and was told that my results are still inconclusive - acidity was shown but it may be due to a dry throat rather than reflux, especially since when I had symptoms in the day no reflux was present, and when I was asleep, I'd wake up fine despite stupidly high amounts of reflux going on-!
Anyway, I spoke to my specialist about the Peptest rapid spit test. Sadly I heard something I wish I didn't hear. He has heard of the test, but considers it poor at diagnosing LPR/GERD. He said because of my symptoms are so similar to reflux, the test must not be sensitive enough. Is he right? I had 1 positive result, but 20 negative ones, even at my worst.