The following links may be of interest to you:
National Council for Hypnotherapy: NCH
UK Confederation of Hypnotherapy Organisations: UKCHO
Reuters : Hypnosis eases breast cancer surgery pain:study
Special Report: British Medical Journal
Self-Help: IBS
Should Nicola not be in your geographic location, she works with other hypnotherapists who may be able to help you:
www.HypnotherapistRegister.com