I'm 15 and got 34D boobs, but one boob is about 3 cup sizes bigger than the other, I'm scared these are always going to be like this, should I go and see a doctor? Or should I just leave it?
So one side is a 34D and the other is a 34A/B? (You said one is 3 cup sizes bigger than the other) If this is true, you'll need a reduction on the one side (or a surgery to make the other larger) so they both match.