recovering last saved document

I had been working on a big document on indesign and i saved it many times while i was working on it. I then went away from my computer for 6 days and when i came back into my office my computer closed all my documents. I went to open my indesign file and it asked if i wanted to restore my file (I believe thats what it said), and it said yes, no, or cancel and it said to cancel if i wanted to do this at a later time. I was unaware of what it was talking about so I hit cancel. now everything i had worked on this project for the last two days i had been working on this are gone, it somehow has reverted back to when the computer was last turned off. i know for a fact that i had saved this file many times since. How do i get this fixed. it stated that if i hit cancel i could go back and do that at a later time. thanks