InDesign error - doesn't open a specific file

Hello!

I'm facing trouble opening a file I was designing. It worked fine until I tried to save a pdf and the program crashed for the first time. Then, when I tried to open the file, it didn't work.

I've tried re-starting the computer, and re-installing the program, but nothing seems to work. When I try opening other files it opens normally. I don't understand why this is happening and I really need to be able access the file.

Thank you!