I have never had this happen.
SO and I were intimate last night. Afterwards my breasts seemed a little extra sensitive. I went to put lotion on, and noticed I had a small amount of lactation! Um' okay ... interesting. I thought, oh, It will go away by morning. This morning it had not gone away. Okay, I go on with my day. It's a little WORSE!
I have the Mirena, and I haven't had a period for a couple years now -- last weekend, and now, again today!?
Does anyone have any experience with this happening?