Pick Up the Phone
I learned the hard way that when the doctors call, you pick up the phone. One of the frustrating aspects of the medical system is it is very hard to get in touch with the people you need to get in touch with. Of course, they call at the worst times but if you don’t pick up and call back (even if it’s just 5 minutes later), you will be on hold for at least an hour.
All of this to say, your health is important. So even if it is the worst possible time, in class, interview, etc, excuse yourself and pick up the phone.