Recovering Unsaved Excel Spreadsheets


I was working on a few excel spreadsheets yesterday (which I had not had the opportunity to save) when my computer froze and I was forced to restart it. This has happened to me when I have been working in Word and I have found that when I open up Word (after shutting down) that the unsaved files are recovered and appear. This did not happen with Excel however, and I am panicking that I lost the information that I had input into the files. Is there a way to recover these files?! HELP!!!!!