Is it a sin to ask "gifted" people for help?

My brother knows a girl who claims to be gifted, she says she can read people's spirits and talk to them. I have been going through a tough time recently, and my brother knows so out of curiosity he asked her about me. She didn't know what I was going through other than the fact that I have been really upset lately. She said a lot of things about my "spirit" that were eerily accurate. I thought that my brother was making it up, or he told her about my situation, but he didn't. The problem is that I'm a muslim. I was wondering if it is okay for me to ask this girl for more details, and ask her to help me. Would this be shirk or a sin?