To envision yourself drowning in water means that you feel like you are suffocating under the stress and pressures of every day life. At this point, you may be going through periods of unhappiness. Water is considered the essence of life. However, to see yourself drowning in your dream indicates the hardships of your life is slowly taking a command over your body, dragging you down into the profound depths of the abyss.
In order to remedy this, you must learn to cope and free yourself from the grasp of your problems. It is either sink or swim.