Also take some paracetamol. You can express in the shower to get rid of some of the soreness but don’t express in the early morning because they will stimulate more milk to come in x
Don’t touch them! Wear a fairly tight sports bra for the next few days even sleep in it, this was the advice my midwife gave me after having my first 3 years ago when I said I didn’t plan on BF, they got really big hard and sore for a few days but I just didn’t touch them and I never leaked they went down in a few days x
This might sound ridiculous but my mum and my friend who tried it said it worked, put cabbage leaves into your bra, and in about a week it stops milk flow and the painful swelling etc! (Old wives tale, but it’s worked for a few ladies I know!)