Drying up milk supply

Mallory
I would like to know from all the formula feeding mommies how they got their milk to dry up. My milk came in last night and holy painful. I already have cold wet cabbage in my bra. I have two bras on that make it tighter but I feel like the engorgement and pain is just increasing.... :/ anyone else have any suggestion. And how long did it take for the milk to dry.