found another lump,i think

hi everyone,
i think i’ve found another lump directly under my scar.had a fibroadenoma removed at the end of april.although i know it maybe scar tissue i’m still worried.the right thing to do i know is to go and get it checked but i’m not sure i can go through the same process again.all that uncertainty and waiting is so hard.whats the chances it is a lump where my old one was,and how many people go on to develop breast cancer after having a fibroadenoma removed.
thank you in advance for your replys
kelly