Is it normal to dream the same dream for a month and still dream it?

I have dreamed the same dream for longer than a month. I dreamed that a mad scientist like friend of mine called me up and told me I had to go over to her house to see her latest invention. When I got there she gave me a creepy smile and I felt uneasy. I was already there so there was no backing down from this. She decided to use me as a guinie(sp?) pig and test it out. She shoved me through it and at the last moment the landing thing (forgot what it was called) shifted and I ended up falling 16 stories and landing on my face! I called her and started to yell at her about trying to kill me when two guys walked over. They asked if I was alright and took me to some underground doctor. I only had a bruised muscle! I ended up having to stay with Shizuo Heiwajima (if you've seen Durarara!!, you know what I'm talking about) because no one else had any room at their houses. As we were heading to Shizuo's house we ran into an enemy of his named Izaya Orihara. They fought and I broke it up by punching both of them in the face and dragging Shizuo away. The next day in my dream I got into a fight with a pack of lycans and got injured. That would be one Halloween they won't forget in a hurry. It keeps adding on to the scene before it and now I'm starting to see them in my waking moments as well! Is it normal? Am I going crazy? I told my brother and he laughed at me.