Xp user account problem....

[cateye]

i have xp sp2 .. i created 2 accounts in my pc ...
1 is admin ... name omer ...
2nd is guset .....

now the problem is my sis loged from my account ADMINSTRATOR ACCOUNT n made another admin account ... n now i arrived from office n all there was only 2 accounts


my sis account .. ADMNIN... name subal
n 2nd account is guest account ...

i logged from guest all my files were gone or i can access them ...
i logged from admin my sis account n still i cant see any of my files ... all my files were in my doucments ... so tell me what to do ???/

and if i want to create another admin account name OMER it says already exist ... but i cant see it WTF is wrong .. plz help ... other wise i will losse all 20 gb data from my 80 gb hdd... just tell me how to get them back any way i copy them ... plz any 1 .....

i will really appreciate.....
thanks in advance