Have you tried Claratin or an antihistamine that does not cause drowsiness? ET causes excess histamine production, and if you are prone to seasonal allergies, ET makes them worse.

I do sympathize with your situation. Whatever upsets an important part of normal life for us can be worse than the actual disease. My ET came on at age 54 and affected how much energy I had to participate in my son's high school years. I am still beating myself up for that.