Is it Psychotic Depression or is it something else?

[Mana]

I have been feeling different for almost a year now. I started to notice the wierd symptoms I have been having, I checked the symptoms and many of the symptoms that I had were similar to Psychotic Depression. I have seen a therapist, but I have not yet taking any medicines. I have spoken to someone from my school of what is happen to me and she said that I might have a "gift". I can feel presences of one person or many, I don't feel like they are going to hurt me, but I do feel akward when I feel them. I can feel like they are walking behind me, sitting in a room I pass by. Sometimes I would get this image of a person in my head, this old man who seems very upset, I could also hear this little girl talk to me. Before I found out about Psychotic Depression, I felt this man stand next to me when I was sleeping, I got this bad feeling from it, but it only happen that once.

I want to know if there is any way I can find out what is going with me, besides taking test to see if I have depression.