First of all see how much the medium would cost. Thats what i would do, because if its rediculously high, then their scamming you. I had a friend who was a medium, and he was pretty sure he could do what mediums are considered to be able to do.
If i was her, i would go, i would just go to check it out. Go explore, tell her not to say anything to the medium. See if the medium is accurate on describing the spirit that is hanging around your friend. If the medium picks up on someone that has died around her like a description of someone she knows, then the medium knows what their doing. Spirits can harm, thats what you got to watch out for. But you have the power to cast them away out of your space. I remember having a bad feeling in one of my rooms at home, the bookshelf was shacking and i felt someone. I told them to leave me a lone this is my space and then it left.
I think your friend should go see the medium, go explore, check it out, see whats hanging around her. Because you wont know until you try. And if you dont try you wont overcome it.
Hope this helps
