Since I see that no one is answering you question directly, let me jump in and try to help and inject some common sense as well.
To answer your question specifically about Leah Weiss, She bills herself not only as an energy healer, but also as a therapist and a mental health counselor. However, she has no qualifications for that, she is not licensed, and to the best of my knowledge, she has no training that would allow her act in that capacity. But rather than talking about one person in particular, let me make the following few points that should help you and others make an informed decision.
Energy healing / alternative medicine: The fact is, recent reviews have concluded that there is no evidence supporting clinical efficacy. The theoretical basis of healing has been criticized, research and reviews supportive of energy medicine have been criticized for containing methodological flaws and selection bias and positive therapeutic results have been dismissed as the result of known psychological mechanisms. Natural creams that did work wonders have been found to be a fraud! With dangerous steroids as the key ingredient!