What will be visible at 5/6wk U/S?

MomOf2 • Married 💏 DD:4yrs old 👑 Angel Baby 5/6/2014 👼 My Rainbow Baby! 5/21/2015 👶🍼💙
So I have my 1st u/s tomorrow, I'm 5wks+5 but could be 6wks! 
​What should the u/s show? Could I maybe see the heart beat already? Or is it too early?