If you have the money, I believe that you should be able to find a trusted hypnotherapist, My mum is learning hypnotherapy, and has a few clients.
One thing that I have learnt is that self hypnosis is good - but nothing is better than having someone else do a full assessment on you and it is limitless.
But I obviously understand your fear of not trusting someone else to do it. There are good hypnotists out there, normally you can check the background and if they have certificates for it!
Plus, I know you won't believe me right now - but you cannot make someone do what they want you to do by hypnosis, you have complete control. The people you see on tv on these tv programs are the kind of people who would do crazy stuff to start with - they only pick that type of person out of the audience!