How to recover deleted text on notes

I was keeping my stats for a game on this note, and I had this really long code pasted at the bottom which I would have to paste into the website every time I played it. I went to copy the code but accidentally deleted it. Right as I went to shake my phone, my finger slipped and accidentally I typed in a few random letters. Every time I try the ‘shake to undo’ it just undoes the few letters I typed. Is there any way to get the code back or not? I really don’t wanna lose every thing that I did on the game, but if there truly is no way to get it back, I understand.