Letting your milk dry up

Amanda 👨‍👩‍👧‍👦 • 27. Mom of two.Married. Dacien&Delaney 💙💖
I'm 4.5 weeks pp and have been Ebf so far but I'm having to switch my daughter to formula, for reasons that will benefit her better. Anyone have tips for drying up your milk supply and helping with the pain?
Right now there extremely hard and engorged and painful. I have cabbage leaves in my bra right now which seems to help with the pain a little and they feel good when cold.