Well Susan, I was going to say what others have said. Spend your energies on getting the tests done, getting your notebook gathered with all pertinent information (like business cards from each of your doctors and test facilities because you will have to fill out info sheets a million times, pages for notes, written test results, questions, etc.) and conquering household things that will have to take a back seat once you start treatment.
In other words, do things that you can control and wait for the experts at Sloan to answer your questions (you know the ones in your organized notebook ;)) based on those tests and give you their diagnosis and treatment plans.
And to keep the anxiety down, I would take Brian up on that phone call to see if your appt. can be moved up.
Been there, done that, got the grey hairs to show for it,
Deb