I did a massive amount of online research and was copying the links into
about 30 different pages inside my notebook. I then decided to consolidate
the content of several pages into a smaller number of pages. Without thinking
I somehow deleted my entire NOTEBOOK vs. just a page. I saw no 'undo' option.
I looked in the Recycle bin, but didn't find any OneNote file.

Please help me if you can. Thank you!