Not directly, the undo que is cleared when you save. Depending on what you need and how often you have saved, the BPN file might be able to help (assuming you have the feature turned on). It is the previous saved version of your project. I assume you are not using teamwork, but there are more options/possibilities there.
If you are just tring to get back to a state that was never saved, I am afraid you are out of luck.