What are some good signs that boobs are growing? Because I just got a fit at Victoria's Secret last week and turns out I grew about 3 sizes bigger. I was a 36B & fit perfectly at a 34C with my new fitting. Tbh, I've ignored the fact that my boobs would've grown bc my mom's side is kind small in that area. (I've worn a 36B for about 2-3 years throughout high school. Same bras. They're worn out) My period has been over recently, but I still feel more sore than usual. My back is hurting on the chest area. It's not my old bras doing 100% of it also. The soreness and back pain is there when I'm not wearing a bra at all (most of my time at home). Are they just being tender or are they still growing? I want to know the signs. I'm almost 20. I'm trying to see if I should wait it out to grow so I can buy another 34C bra or just wait it out and get another estimate/fit.