Potential breast cancer

Hello,

My wife (35)  has noticed a lump in her breast and has just had a GP appt to check it out.  The GP has told us it is abnormal and referred her to an urgent appt at our local hospital. The lump is circa 1inch apparently. 

She is also breastfeeding currently  with our 3 month old if if that is any extra knowledge worth knowing.

Is there any knowledge / information anyone can give on everything and also what i can do to support her as my head is all over the place and I want to make sure I am doing anything I can to support her.