Congrats on your pregnancy I had the same thing as you, breasts weren't sore at all! I was worried too, even mentioned it to my ob when I saw him at our visit and he said it is nothing to worry about. I guess the breasts have already created what they needed to last time. Mine just gradually grew over a few months. Very occasionally they would hurt but not very much, but that was when I was further along. It's nothing like last time!
First pregnancy they were tender for the first few weeks and then no issue. This pregnancy though they are killing me, but I'm still breastfeeding DS so that could be contributing to it.
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