I did something to lose the text in my document and the edit undo function is not bringing it back. I was using a lot of copy and paste functions to add stuff from the internet and other docs that I have, that I was then editing and rewriting for a contract I'm writing. I think I deleted the little symbol that looks like a mini page? (I don't know what it is) I think this may have caused the deleting of my text inside the document (90% of my work is gone). Is there anyway to get it back? I have not closed the document or saved anything, I have done several undo edits to no avail...any help is appreciated!

If there is a video that I can learn from for this type of issue, I'm open to that help as well