Lump in breast, 2 week referral

Hello everyone, 

 

found a lump above my nipple (inner breast not out)  - a bit bigger than a pea - no pain, can't be felt when laid down. 
just had my 2ww referral for end of the month. 
 

I am so sad, so nervous. Don't know what to expect, my mind obviously just wants to think the worst. 
I'm so frightened, I've just turned 30, with no children as of yet.