The Sphinx suggests discrete observation. It suggests that you behave like a wise person who knows more than they hear, but who keeps that information to themselves until the time is right.
Because of this, Sphinx is associated with the ability to keep secrets, but at the same time manage to wheedle them out of other people.
Another aspect of the Sphinx is that it represents our equality with the other animals, and thus the implications of the card include the love of animals. It also holds the energy of secrecy, observation, and patience.
If the Sphinx has shown up here, then the kind of energy described above will help you feel more grounded.