Breast swelling

Rachael
I breast fed my baby the first 2 days and then switched to formula, today my breasts were a tad swollen so I figure I'd relieve some milk expressing with a pump but I woke up just now and they're a little sore and starting to engorge! suggestions on how to help this? Should I pump a little more out or will that just make me produce more? or just try ice? Or any other methods that work?! ( . V . ) 😂