It sounds like you've already received some great information so I won't repeat what's been said. While you are waiting to have some of these tests I would try to avoid some general things that have been know to assault nerves such as sugar, alcohol, many posters can't tolerate caffeine and spicy food. Now would be a good time to start keeping a journal if you haven't already. You can write down questions you want to ask the doctor and also take notes when you go. If you can have someone go with you so you have support and an extra pair of ears. They can take the notes so you can just concentrate on the appointment. When you have your tests you can always post resulted if you have questions. There is a wealth of knowledgeable people here. Hope this helps.
Carol