Pages Disappeared :(

Hello,

I was editing WordPress, my browser crushed and after I restarted my browser and re-opened the last session, my 2 pages I was working on today are missing (#shock#cry)
– yes, they did open with 404 error – no such page and I can not find them anywhere….not in pages, not in deleted, not in drafts….But I am pretty sure I was not dreaming half a day, and they where there and published…
Today I downloaded iframe plugin and started experimenting with it and set up 2 pages…..and now – 2 pages disappeared and my iframe plugin has disappeared as well…I re-installed from new my iframe plugin (like it never has been there) and had to build up my pages…
But I’m still shocked, never seen this before….