Well certainly you should talk to any therapist about your concerns if it's an issue. There are certain people who less hypnotizable than others; some people are said to be incapable of reaching a hypnotic state with the help of a hypnotist.
But if you're set on making it work, you should read up on and practice meditation. This will help you cultivate the relaxed/nonthinking state of mind you would want for hypnosis to be effective. But again, talk with your therapist about your concerns and they should be able to find a solution that works for your particular situation.
|