I just about FREAKED-OUT just now. I wasn't able to sign-in at ALL... panic set in, and I spent a frantic hour or so trying to submit HELP comments, etc. to blogger. I am so unaware of how this all works... anyhoo, I had checked a box to upgrade to the new blogger, and that was the culprit. When I just checked RETURN TO OLD BLOGGER it all came back... Whew !!!
Thought I'd post this in case anyone else had the same problem.