What was your breast tenderness like?

So there's a possibility that I'm pregnant with my second, and I had some weird sensations in my breasts yesterday and this morning. With my first, I don't recall having breast tenderness early in pregnancy, so I'm not sure what it usually feels like. It's not an achy or sore feeling, really. The closest thing I can compare it to is when my breasts would become too full or when I would have a milk letdown during the time I was nursing my daughter. Almost like a slight stinging/tingling? I feel pretty certain it's not related to my period because I'm not due to get that for another 6 days or so. Anyone else have a similar sensation early in their pregnancy? I know I can't be sure until I miss my period, but I was just curious how this felt for others. Thanks!