Newly diagnosed -aged 35, terrified

Breast cancer- I’m 35 with a 3 year old and a 5month old. I recently discovered a lump in my left breast and went to my doctor to get it checked she was certain it was a blocked milk duct- it’s not. I got my biopsy results yesterday invasive ductal breast cancer stage 2/3 with spread to 3 lymph nodes. It’s her+. I still haven’t got around the fact I have cancer and I’m terrified as a young mum, I’m going to be starting chemo soon but I had a ct scan today and and mri next week. I’m am beyond stressed and worried, it was so much information to take in yesterday all different terms and possibilities. Can anyone share any advice/knowledge to help. I’m avoiding over researching on the net but thought this group of supportive women could help

update- my ct is clear no spread. Left breast and 3 lymph nodes (closest to my lump which is 5.7cm) so relieved. I'm taking this as a huge positive! Have mri next week