Flash going extremely slow (certain documents)

For some reason whenever I try to access a any of the files within a project that I’m working on it goes extremely slow. I’ll click something, or type something and it’ll take like 30 seconds before I actually see it do anything. I never had this problem with this project before, seems like it came out of no where. If I just make a new document, or goto another project it’s fine. Anyone have any ideas?