Hi @Shan_07
I was diagnosed this year with stage 4 metastatic triple neg breast cancer when I was 14 weeks pregnant. I started chemo at 18 weeks. I know how you feel. I wish I could say the perfect sentence that will make this easier for you but there isn't one. But I am a glass quarter full kinda gal and I like to think that most people, when they are diagnosed, are stuck thinking about cancer constantly. For us, we get to think about the incoming child too. That is something super positive happening in amongst the shit.
Make sure you have a great obstetrician - my one in Canberra was an absolutely saviour. And make sure they and your oncologist are prepared to work together. It will be a team effort.
I know just how scared you are right now. But you can do this and shockingly, chemo and pregnancy can be done. My daughter is 13 weeks now and she is absolutely perfect. Not just in a hormone mum way, but also in a healthy, happy normal kid way too. There is no signs the chemo effected her at all. She was born with a full head of hair. Way more than I have. :-) My husband said to me "how else do you think super heroes are born?" :-) she hasn't started flying yet but we are on the lookout.
Look after yourself. Be selfish. You can do this.