Since this is a new lump that's been noticeable for over a month, it qualifies as a breast change, and all breast changes should be seen and evaluated by a doctor. There's every chance this has nothing to do with cancer; breast lumps can have many different causes. However, you do need to rule out cancer, even at your age when it's incredibly rare; so please see a doctor, OK?
BTW, in case you're uninsured, not having health insurance is not a good reason to avoid the doctor; speak to the folks at your local hsopital, and ask them what kind of programs they have for women without insurance. There's every chance your diagnostic process will be quite inexpensive, and possibly even free. Good luck - PJH
PJ is absolutely right. With a lump that has lasted longer than a month accompanied by swelling and itching, you need to see a doctor as soon as possible. Breast cancer is unusual in women your age, so it will probably turn out that this is some sort of infection or benign lump. It could be some sort of response to the hormones in your birth control although usually those hormonal variations are more likely to affect both breasts. However, it is important to rule out cancer as the cause of your symptoms so that you can have peace of mind.
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