You'll do just fine with the test. The worst part is being without meds...once you get the probe in place it's annoying when you swallow, but not all that bad. On the bright side, it will help sort out what's going on with you, and hopefully get you moving in the right direction!
Words of wisdom by Eckhart Tolle:
"Whatever you fight, you strengthen, and what you resist, persists.”
“Worry pretends to be necessary but serves no useful purpose”
“Accept - then act. Whatever the present moment contains, accept it as if you had chosen it. Always work with it, not against it.”