I am currently on the 9th month of my PM regimen, a lot of changes have taken place all over my body from face to feet

during this time. I'm noticing that my left breast is very sore (my right isn't at all) and it is also much larger than the right one.
The left breast looks much fuller and appears to have a much deeper growth, I can feel the breast tissue underneath the nipple much more than on the other side, and it hurts a lot when I touch it.
Has anyone else experienced this? I'm guessing one side is more dominant than the other but the growth difference is quite a lot.