the last 12 hours of Tweets have vanished

All my twitters from last night have disappeared, and each time I post a new one it knocks out the last twitter I made.

Please can this be sorted ASAP and my tweets from the last 12 hours restored. I rely on the networking of Twitter and can't afford to lose tweets.

Also, I've just tried to post this report and it won't let me log in, it also doesn't recognise my email address, even though I'm able to tweet still and change my password. Very odd. I've had to add another account using a different username and password. But the account in question is selina_wragg@hotmail.co.uk and username Selbelina

Thanks