Frustration computing

They say computers have minds of their own - and I think I believe them !

Mine has made me really frustrated today. I did a largish typing job yesterday, using Publisher, which I normally use, and kept frequently Saving my work. I printed off a copy and it all printed out fine, so I closed the file in the normal way, again saving the work.

So, why when I open the file this morning, has it not saved any of the work? I needed to alter a couple of things after a friend had proof read the work for me, but it`s not there. What happened? its a mystery to me.