Please could you advise me on what to do as I am in a lot of pain. My milk came in yesterday and woke up this morning, and they're very painful/hard/full. I keep getting conflicting advice when I google, some say hand expressing will make it worse and to just leave them. Others say leaving it be will cause Mastitis. Please help. What did you do? I can't even imagine hand expressing as that seems painful! Definitely want to stick to formula feeding