I find this so sad, Becca. Why the heck do patients have to search for studies on "positive antibodies/negative EMG" when that's a doctor's job?!!!
There are plenty of articles in PubMed about it.
Did they give you a reason for the elevated IgA? That most definitely needs further investigation! Did they do serum or urine protein electrophoreses?
I hope Mayo can help you. You do really need all of this investigated.
Be aware, if you aren't already, that we may have severe storms today and more flooding in MN. In the Rochester area, roads are often blocked for miles when that happens!

Annie