Hello,
Thank you for posting your query at DoctorSpring.com
As per your description, there is no lump in the breast.One lymph node is present and it is stationary.
As there is no lesion with Micro calcification, there is nothing to worry.
Regarding early detection, you can go for BRCA1 & BRCA2 genes mutation test as your aunt had breast cancer.If it is positive, it is better to have an MRI of the breast along with Mammogram yearly.Both MRI and Mammogram have to be taken .
Any suspicious lesion has to be removed and sent for histopathological examination.
I advice you to get FNAC ( Fine Needle aspiration Cytology ) of the lymph node.If it is due to infection, antibiotics may help.
Hope I answered your query.
If you have any questions, I will clarify further.
Wish you good health.
Regards