Survivor since 2010
My sister & cousin both had triple negative breast cancer (in their lymph nodes, too) & are both survivors! My best friend is fighting stage III triple negative breast cancer right now at the age of 26 & she's kicking it's ass! Your mom will, too. If there is a family history of breast cancer or your mom is younger than 40, you might talk to your doctor (&/or hers) about genetic testing. They have identified gene mutations that drastically increase your risk of breast & ovarian cancer. I don't mean to freak you out or imply that anyone in your family has one of these gene mutations, I am merely passing on information that might prove helpful.
Like Diana, I recommend your mom get in touch with other women who have or have survived breast cancer. She may meet some during treatment or you can help her search for a local support group.
And at 10 weeks pregnant, your mom has plenty of time to enjoy your pregnancy! If she begins chemo treatments or undergoes surgery soon, I'm sure just thinking about you & that little one will lift her spirits & help her fight. You ladies can get through this! I'll keep you all in my most positive of thoughts.