when my thumb hit one wrong button and it was all gone

That has happened to me too many times. Sometimes it isn't even a button that I hit, I use wireless internet and sometimes when I hit *post comment*, it just disappears.

I have learned to either do it in word and cut and paste it, or if I am typing right into the comment box, I'll copy part way through a couple of times till it is complete, then if it disappears I can just paste it back in and continue.

I know that doesn't help your frustration here, but sister, I have been in your shoes and it is really a pisser.

Good luck for future commenting.