My breasts started growing unexpectedly about a week ago. They have increased a cup size from 36d to 36dd and appear to still be growing. They were and are sore on and off, the soreness I more-or-less remember when my breasts were growing in high school, but I'm 27 years ago. I haven't gained any weight, am not on any medication including birth control, and am not pregnant (haven't had sex in months). As I have no health insurance, I googled this, examined myself to make sure there were no lumps or anything, and while certain websites said that breast growth in mid-upper 20s isn't entirely uncommon, I wanted to make sure I'm covering all my bases.