My left boob changed

Samantha

So my right breast has always been quite a bit bigger than my left, so much so that it surprised my doctor during my first breast exam. I’m almost 24 now, and my left breast is suddenly the same size as my right. I know it’s definitely a matter of growth rather than shrinkage, because I’ve had a steady size of just over a handful for about a year now (on one side anyway lol). I’m just wondering if that’s something I should be worried about?