Welcome to the chat you don't want to be in @JessJj1986, everyone here is so supportive.
I had invasive ductal and lobular, stage 3, found a month into lockdown one when I was 10 years older than you with an 8 & 10 year old. I'm still here, fitter than ever. I had a mastectomy, lymph node clearance, 18 weeks of cheno, 15 sessions of radio and finally a delayed reconstruction. You may feel that you have stepped onto a hamster wheel of appointments, please remember we are here to vent to. Some posters are around frequently, some (like me) dip in and out.
Your treatment will depend on the type and grade of your cancer, but it's highly likely someone here will have the same or similar.
My biggest tip is the one no one wants to hear. Exercise. It's good for my mental health and will also help set you up for any surgery or chemo. I can't say I enjoy all of it (about to go shuffle round the village, starting couch 25K again) but it is sooooooo worth it. Following my latest surgery I was told I shouldn't be recovering as quickly as I was, and I was an anomaly!!!
Please ask any questions, the more random the better, and I'm sure someone will be able to answer them. The worst is the wait for information 😭please never feel alone x