Just an update - I saw the dentist today. He took an xray and poked around in there. He couldn't find anthing wrong, said the xray was fine, compared it to the one from 3 years ago and there was no change. He said I needed a cleaning which I expected him to say as it has been 18 months. I scheduled that for later this month. I'm not real confident that will clear up the horrible taste/order but hope it does despite my negativity about it