Terrified please can anyone help?

Hi I am looking for any words of advice please. My mum was recalled to the breast clinic earlier this week where the nurse carried out some additional mammograms and an ultrasound. She said that she suspects my mum has breast cancer with a lump measuring 1.4cm. She has taken a biopsy and we are awaiting the final results. I am absolutely petrified that I will lose my mum. I have already lost my grandma to this and what I am worried about is the biopsy saying that the cancer is aggressive. I can't sleep , I can't eat I am literally struggling. As it stands, it looks like there's no lymph node involvement. So that's good but I'm terrified she won't pull through this. Thank you