Posted 10/1/2013 2:55 PM (GMT -5)
Sparky, if you suffer from celiac's disease (gluten intolerance) as some people with Lyme do, then your autoimmune system may have been attacking your thyroid. Now that you have stopped the attack, your thyroid may be repairing itself, thus the change in mood.
Here is a link that explains the above: http://celiacdisease.about.com/od/commoncomplicationsofcd/a/Celiac-Disease-Thyroid-Diseases-Often-Found-Together.htm