My mom and I have the same thing happen all the time. The only problem was the "normal" lump wasnt so normal this time. She had to have her right breast removed due to cancer last September
She's okay, but now I always
get them checked at the doc's multiple times because Im high risk and Im not playing games.
Def. go back to the doctor and if he says its nothing and you still think its something, get a second opinion. Its not worth your life