Couple of weeks. Ensure baby is latched properly and you keep up nipple care. You can use shields if it’s painful. Good luck 😊
It can take a couple of weeks until they toughen up. Put a little bit of breastmilk over each nipple and let them air dry after every feed. That helps a lot, also use nipple cream when you can. Make sure baby has latched correctly each time and the pain will fade quickly.
I was in horrible pain when feeding at the start. I almost stopped breastfeeding. My midwife have me nipple shields and it made it Better!!