Hi,
You seem to have a fibroadenoma. Fibroadenoma is a benign tumour of the breast. It is common among the young females. nothing to worry about. Can have surgical excision if you feel uncomfortable.
Hi,
It could be a lymph node or fibroadenoma. Yes you need to get it checked to be absolutely sure. Have you noticed an increase in the size of the lump? Is there a family history of cancer? Also is there any relation to your menstrual cycle? It could be a cyst too. Get a clinical evaluation done by a physician to clear all doubts. Goodluck.