You do not lose control or surrender your will in hypnosis. All hypnosis is really self hypnosis.
You do not lose consciousness and have amnesia for the experience.
Hypnosis does not contaminate memory however it is not a lie detector or truth serum. It is simply a source of information.
You do not need a hypnotist to enter trance once you have learned the art of self hypnosis. You have already experienced the every day trance of driving somewhere and not remembering how you got there or being so absorbed in a book or movie that everything else fades into the background.
There are other myths about hypnosis but if you have questions or concerns, please feel free to contact me.