I remember my rapid growth period.
Within the first sector of hormone intake I grew into an A cup quite rapidly, when I would walk without wearing support it would hurt because everything was just jiggly sort of speak.
thats when bra shelf tank tops became my friend! if you wear anything to compress your chest softly it won't hurt as much.
Also it wlil protect from little oopsy's of hitting them by accident.
Go to walmart, im sure you can find a tank top with a bra shelf, what I mean by that is its a bank in the tank top as if its a bra built in.
Try to get something soft all around with no padding, the padding ones look really weird.
I bought all my stuff from the
lasenza.com website in the spirit wear back in the day
but if your like me I understand your pain till i figured these shirts out!