Cyst's or possible breast cancer?

Hi
I've just be thinking a lot lately. I'm 16 so I know the likelihood of me having breast cancer are REALLY small, but possible...
In both of my breasts near are lumps. They are not painful or attatched to anything and they come across to sometimes get larger and next get smaller, but they're complex. Are these cyst's? I've had them for a long time, and I be just wondering. At my subsequent physical should I menchione it? Thanks. Getting bigger and smaller, bigger and smaller sounds rather close to something that cysts do, along with hormonal fluctuations. I believe cancer lumps can single enlarge. The prime reason I surmise you should mention it is so your doctor can confirm what I just said, which is more credible to reassure you then some stranger's belief. Peace of mind is a valuable entry, and there's no harm surrounded by asking about it.
you should mention them if you are worried almost them.
I my self think those are everyday breast tissue responding to you hormonal rages.