Re: Sudden soft breasts!
Don't worry about it. Your breasts don't operate on a clockwork schedule. They're more artistic. Sometimes they cook up a huge batch of milk, sometimes they relax a little. And eventually, they're going to get the message to make pretty much what your baby takes, and not a lot more. When that happens, you can expect to feel soft pretty much all the time, and you can also expect a diminished or even vanished letdown sensation.
Any concerns, just watch the baby and the baby's diaper output. As long as that's normal, so is your milk supply.
Coolest thing my big girl said recently: "How can you tell the world is moving when you are standing on it?"
Coolest thing my little girl sang recently: "I love dat one-two pupples!"