No breast tenderness

As far as I can think back to when I first started my period (13 yrs old) I've ALWAYS had breast tenderness about 3 days before my period and continue on until the end of my period. But around May of this year, out of no where I stopped having tenderness. I'm not complaining, I just think its unusual that I went from having so much pain in my boobs to the point where I had to sleep on my back otherwise I would be in hurting to having absolutely no pain at all. They don't even go up a cup size like they used to. I'm just curious, has anyone else experienced this???