If you are thinking this is some kind of issue or mental disorder then I recommend that you consult a doctor or a therapist immediately.
From what I have read over the years, it is normal for teens to go through situations where they get the sensation of deja vu. I, myself, have gotten this feeling when I was younger too; however, it has gone away over the past few months. It is quite common for males and females to experience the feeling of deja vu from the ages of 15 - 25. This was actually a result from a study observed by Journal of Nervous and Mental Disease back in 2003.