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I'm afraid if you did not save the document or at least name it once then you are out of luck. You can try a screenshot of the page to at least save what is visible:
To take a screenshot hold down Shift and Command (⌘) and then hit the number 3, you will hear a click and the picture will be in Pictures or Desktop folder. To take a selective screenshot hold Shift and Command (⌘) and then hit the number 4, you will see a crosshair drag it over the area you want to take a picture of and let go.