Hi, Kitt, thanks for the welcome!

MrsD, thanks for the reply! I think I'll test thyroid then! The PN was progressing before I got pregnant, too, so I don't really know whether pregnancy has had any effect on it. I've actually been using a blood glucose meter to check blood sugars, and if I eat poorly (too many carbs at a sitting) I do notice the tingling is worse the following morning, and that my blood sugar will go into the prediabetic (though not diabetic) range. So there may well be an insulin resistance component to this, even though my A1C was 5.1 and fasting sugar was 96. I've already changed my diet to be much healthier, and cut out the carb overloads. It has fixed the blood sugar spikes, but I can't say for sure whether it's healing the PN. It sure is making me skinny, anyway.