How would you interpret this recurring dream?

I used to have this dream, and I've always wonder what it meant. I would walk to this city that's about a 2 hour drive from where I actually lived, but it never took long. As I went to this city, I'd p a plantation where these girls from my cl (generally ones who were mean to me) were working. When I got into the city, I'd go into this office building. All of the sudden, a T-Rex would start chasing me through the office building. It never caught me, but when we'd get on the elevator, it wouldn't eat me. It waited until the doors opened and started chasing me. I always woke up before it caught me, though.