To dream that you are having a terrific time at a circus implies that you are happy with your position and situation in life. To dream that you are just at the circus can mean that you are portraying a false image to those around you. You are hiding behind a facade; perhaps afraid to reveal your emotions. Others will deem you to be someone you are not.
To dream that there is chaos at the circus suggests that you are feeling unorganized and unable to manage the various aspects of your life.