go to a doctor to make sure it isnt breast cancer
Please see your primary care or gyn doctor ASAP and tell them about the abnormality in your breast. Hopefully they will order a diagnostic mammogram right away (and they might want to order an ultrasound of the breast as well). Also, ask them to feel the lymph nodes in your neck for any enlarged ones and see if there is any lab tests they want to run with your symptoms. About the neck- do you think it may be a muscle knot?