So I guess it is to do with hormonal changes.
So pleased for you!!!! 😄
I always had dense, "lumpy" breasts I guess, and I had a scare in my 30's with a large cyst that was aspirated, and again same thing several years later.
But a word of caution .... when I found my latest lump I was absolutely positive it was just another cyst, and only the fact that my brother's wife had recently been diagnosed, plus I was way overdue for scheduled mammogram, prompted me to get it checked.
It did turn out to be a cyst actually, but grade 3 cancerous. So just continue to be vigilant and don't get complacent (like cloth-head here!!! :p)