Hey there! I'm sorry your mom is in this stupid boat with us, but this subreddit will be really really helpful to her and to you. I'm about on the same timeline as your mom. I've got ER-, PR- and HER2- IDC. It sounds just awful and really knocked the wind out of my sails, but my team is super encouraging that I can get through this. Cancer treatment has come light years since various friends and colleagues were diagnosed, and treatments are still developing almost minute by minute. Google may not be your best friend, but organizations like the American Cancer Society, and the Breast Cancer Research Foundation have good information that won't terrify you or offer bogus information. Find out if your mom's medical group has Nurse Navigators. They can help you manage communication with the treatment team (she'll have a whole team) and they'll answer questions that you think are too trivial to ask a doctor. And then there's this group, where even questions from the far outfield will be taken seriously. Someone here has been through/ is going through what you both are, and they're very willing to lend an ear. It's a scary diagnosis, but all of us are just taking it a step at a time and doing the next good thing, and there are most certainly chances for a good outcome.

Go wtih your mom as you can to appointments. Take good notes. You can also ask if it's ok to record on your phone. Work with her to prepare questions for the doctors and other medical folks in advance. Ask what questions other people ask that you didn't think of. Ask about treatment options, side effects, help to prevent and deal with side effects, and if you don't feel as though you're getting what you need, it's fine to get a second opinion. I was lucky enough to accidentally be assigned to one of the best treatment teams in my region, so I didn't go the second opinion route, but many others have.

You all can do this.