I lost fb id


I was using my mobile number as fb id till 23rd march yesterday. I need to open an another account for my frnd. By mistake i used my mobile number as my friend's id on fb. Now he is able to log in but my id (mobile number) is not linked with any account. And i lost my fb account. Pls help me. Hw can i recover my lost id of fb. My mail address is "***@***"