Ann, write down your questions now. When you get there they will all be forgotten!
Dex affects people differently, myself I could not sleep the night I took it; I would stay up all night watching videos(I use earphones ? so as not to wake the wife), answering or putting questions on this website and/or playing on my computer. I also felt I had more energy for a short burst 24 hours ish.
Best of luck for the appointment.
Kindest regards ? Vasabyte
David