how to recover document from libra office writer

I was writing a document on Libra office writer and I must have hit some function with my thumb by the space-bar (it happened so fast I’m not really sure). Now my document is a completely clean sheet. I had been saving this document manually as I went but cant find anything. There appears to be a version of this that looks like.~lock. that will not open but apparently has 127 Bytes? I don’t think this is the document as my document was about three single spaced pages. Any ideas as to what I did and how I might recover it? thanks