I got the thyroid test results today. The levels of whatever it was they tested are within the normal range. The ultrasound showed a couple of small nodules about one centimeter in diameter on the thyroid. They said to follow up in a year. So, no goiter, no messed up thyroid, no need to panic.
But that doesn’t solve my problem.
Since I’m on my way to spend most of the spring and summer helping Lou build shelter, I'll find a clinic there and see if they can do a better job of diagnosing me. And curing me, too, of course.
UPDATE: I'm near Silver City, New Mexico, now and went to a clinic there for another opinion. They agree it’s an infection and not GERD. They prescribed a stronger antibiotic.