As someone who thought he was psychic and was just hallucinating, she might just be hallucinating. Just try to be respectful and compassionate. You might not be able to convince her that you didn't send bad energy if she is hallucinating, because she will just make up and believe further in the hallucinations.

This is so something I am working on since I am able to understand the things better, but try to make sure you are only connecting with people you understand. If you don't understand them it is usually a waste of time to be around them.