Half of my ChatGPT conversation disappeared or got deleted

Hello,

I need some help. I was working on an important document, that was a very long thread or conversation over a 7 day period.

Today I was coping and pasting some of the information into a word document when all of sudden the remaining chat disappeared. It just abruptly stopped. I have the beginning of the chat, but not the second half.

Is there a way to recover the missing parts of the conversation? It’s really important information that is hard to recreate by memory.

And help provided would be greatly appreciated.

Thank you in advance for your help.