Not breast feeding beed advice my boobs are killing me

Heidi.jowett • 24 years young pregnant with my first I'm pommie (English) been in Australia 6 years :)
Ok I had my baby on Sunday and chose to formula feed for many reasons but today my boobs are rock solid and very very sore 
Are there ways I can make them go down or do I just leave them be?? She'll I just let some milk out or will that stop them from drying up 
How do I make them dry up? Really need advice