Libre wont open my full doc, i cant access it , very stressed

I tried to open a doc i have been working on libre for years, and it wont open the whole doc , it starts off showing all the pages and then ends up with a few… and i cant access the rest…

please help, what is going on?
libre is updated. i use windows. what can I do…

All this work is going to be lost, im so stressed right now, anyone have a suggestion?

Edit your question (at this stage, comments will be counter-productive) to make it understable.
Windows: which version?
LO version
Save format
How is your document stored? On your computer disc? On some cloud storage?
Has it been in contact with Google Docs?
Are familiar with styles or do you format everything manually?
Are there many pictures or tables?
Approximate length of document (number of pages)