That has happened to me so many times. I had spent an hour typing my eevee post and then poof, its gone. I finally got into habit of typing it in mic. word and then copying and pasting it. God that is so much better.
btw, school starts next week (hurray...) along with good ol soccer so there might be days I'm not on at all. Don't worry, it'll only be until until Oct. until I'll be on frequently again ^^