If you start choking sometimes drinking water can help clear your esophagus. This is not always the case, especially if something is lodged in your throat or blocking your windpipe, but it’s better to have a drink on hand to help clear or soften whatever is making you choke.

Yes, but first learn to perform the heimlich maneuver on yourself by using the back of a chair or something tall enough to push your diaphragm up.