OK, so I made the mistake of shutting down my computer while trying it was trying to start up, and when I turned it back on a little file with a question mark was flashing on the screen. I forgot what I did but I searched the problem and managed to get to Internet recovery. When I try to search for a time machine backup it just searches forever and nothing came up. I thought I had backed up via time machine but I could be wrong. when I try to reinstall OS X lion theres no disk to select. I tried to look at the disk utility and erase or repair a disk, the only things that came up were disk0 and under it Mac OS X base system, and I can't do anything to it (repair, verify, or erase). am I screwed and just need to replace the HD?

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