wtf. 10btc randomly disappeared from my account

It went from 53 to 43.

From 43 I went down to 20 for gambling.

BUT, I should have 30 correct?

EDIT: Wtf, Iv been trying to withdraw it, It says not enough funds, but subtracts the amount from my acount anyway???

I only has 0.9 in it now.....

wtf...
I want my money