You don't say that you asked you what she meant. That seems to be the logical thing to do. Explain that you didn't mean any disrespect and don't know what you are doing that indicates it. It might be her problem, not yours, in which case there's nothing you can do but keep quiet and endure. But you might also learn something about yourself and your personality that can use some improvement. You'll never know if you don't ask her, however. Now, keep in mind, if you're shadowing a doctor, they're really really arrogant people sometimes who have no real supervision in life -- doctors are in a self-regulated job so they pretty much get away with anything. But you can run into professors or cops who are that way, too, so it's not something confined to doctors. You will run into this in life. Look at this as an opportunity to learn something, not something to worry about. And if it is just that you've bumped into a person with her own issue, again, nothing you can do about that, just keep your own counsel and do what you have to do to finish this leg of your life.