How often do you nurse your newborn?

I'm a FTM and I am just going absolutely crazy. My son is 5 days old. I am nursing him CONSTANTLY. About once per hour sometimes more. It's not the nursing I mind, I just feel like why isn't he getting full? I seem to have a ton of milk.
He seems to latch very well, he eats, I switch sides, he pulls off by himself end seems fine and then ten minutes later is screaming and wiggling his way down to my breast again or eating his blanket. 
I heard this can be fed? I've tried bicycling his legs. 
If this is normal I think I'm ok but I feel like he's not getting full and that worries me. We have even been giving him a small bottle of formula at night just because I want to be sure he is eating somethings. Even after the bottle he is still looking hungry .please help in so frustrated.