Welcome to Healing Well! I'm glad to hear that the forum has been helpful to you. It really does mean a lot to be among people who understand what you're going through. I came here just before deciding to have reflux surgery about three years ago, and have stuck around ever since.
You've certainly been through a lot, and it sounds like you've made a very good choice making the trip to Southwestern Medical. Those types of centers tend to work with patients who have more difficult issues, and that experience is important in helping put the pieces of your puzzle together.
I do think that the testing you're scheduled for is long overdue. It'll provide a lot of information that will help in figuring out what's happening with you.
I'm sure others will be by soon to say hi and share their own thoughts and support.
Good luck with your quest for answers!