Yes, I have never had my boobs bounce until the past week or so, and I'm LOVING it! Mine are also more stretchy, I don't have to shove my boobs as hard to get cleavage as I did before, which is also nice.
I have a hard time believing that size calculator site is accurate... it's telling me I am a 32 AA... there's no way haha. I completely fill out 34 B's so I'm not sure why that site is saying I'm three cup sizes too big. Although since my under bust measures 27.5 inches, according to other sites I shouldn't even wear a bra since that measurement is so small... go figure. haha
Have you entered your measurements in at: http://www.brasizecalculator.tk/ ? On reddit forums for 'correct bra sizes' this site seems to be the general consensus of the most accurate bra size calculator, and most women are a lot larger size than what they may think. According to that site, I am a 28D. I can't confirm this since I have NO IDEA where to find that kind of bra size, but the reddit forums give information about how 'normal' bra sizing (such as getting sized at VS) is completely incorrect, and the correct way to size is to find a band that is the same measurement as your underbust- in my case 28 inches, hence 28 band size. And the cup size is completely relative to how many inches differ between your band/underbust measurement and the fullest part of your breast measurement. For example, a difference of one inch is an A cup I believe, and three inches (in my case) is a D.
Those reddit forums have like a full on cult of women that SWEAR by finding their 'correct' bra size based on that site calculator, and how much better it feels, more comfortable, looks better, etc. That website has a link for the Reddit forum if you would like to browse through (I found it confusing to navigate) but it also explains bra sizing and how most women are wearing a wrong fitting bra, because a proper fitting one is impossible to find in stores.
Anyways, I would definitely recommend putting your measurements in that site and seeing what your 'correct' size is, apparently most women that are wearing an A cup should really be in a B or even C cup (I know that sounds impossible but...) with a way smaller band size, which makes the cup size smaller. So a 34 C is going to have way bigger cups than a 30 C, even though they are both C cups. Sorry this probably is very confusing, but it's worth doing the research, and it's pretty interesting stuff I think! Definitely a fun way to pass the time while noogling
Anyyyyyways... I can totally relate to you! I HATE wearing a bikini just because I look so FLAT, I feel like a 12 year old girl that has yet to hit puberty. It's awful.
PS, stay consistent with the NB and pretty soon you're gonna have bigger boobs than your B cup friend, and she's going to be begging you for your secret!