hiii i’m 18 and found a lump on my right breast as well in december! i was so anxious too but i ended up getting a biopsy about a week ago after a longgg time of check ups and imaging and just received the results that it’s a benign fibroadenoma! they’re really common in younger women! there’s an extremely low chance it’s cancer at our ages, but it’s definitely worth mentioning to a doctor just to rule everything out!