These test done in the order given may result in additional tests, scans, etc due to the first test or the second test. They need to find which path to pursue. Explorations can lead to many different paths.
My experience is when they start getting the ducks in the row, you will be going from pillar to post and later appointments will be moved up. Believe me you will be in good hands and have a health care experience like no other. If you get a little lost finding your way around just ask anyone with a name tag and they will help. If you have extra time, explore the underground shops in the subway walk or enjoy the plaza outside or the lobby displays on any of the Gonda or Mayo upper floors.