When can you hear the heart beat?

Anjellica
I haven't even had an ultrasound yet I'm 4W 6D but I'm supper anxious to hear the heart beat just to make sure everything's ok! 
When is the first ultrasound usually done? Because I don't have my first appointment until I'm 10W (thanks to he VA lol) this is my first pregnancy and I just want to be sure everything's ok. :)