Choking and dreaming of it could very well be a signal for helplessness. To choke is the inability to breathe due to something obstructing the air pathway. Suffocating to death is one of the worst things in life. You are helpless to free yourself, dying in an agonizing manner in which you are completely cut off from a very basic bodily function.
To see yourself choking in your dreams is indicative that there are some things currently taking place during your awake self that you find difficult to digest or accept. Choking in dreams may have different interpretations depending on the substance being choked on.
This dream can also mean that you feel repressed, not being able to fully express how you feel.