Time taken to receive H1B Extension Premium receipt number?

Hello,

My H1B VISA extension is submitted to USCIS as per the Fedex on 24 Feb 2014 in premium processing. But I have not got the receipt number till date. My current H1B VISA and I-94 expires on March 9, 2014.

Can I continue to be in USA after my current VISA expires and I do not get the receipt number before 9th March 2014?

Will I be out of status in case I do not get the receipt number before 9th March, 2014?

Thanks,

SG