Hi JT82,
I so very difficult to give any advice and assist with decision making however I wanted to share a little of my story with you, hopefully you will get some hope from my learnings. I am coming up to 3 years since diagnosis in April this year, at the time I had a 10 month old bub. Never ever feel selfish and reckless for wanting to grow your family - I to have felt that several times, on occassions I have even had friends react negatively to my strong desire to want more children. If I had my chance to do IVF prior to my chemo I would do it in a heart beat (unfortunately at the time we did not decide to do this). It is entirely a personal decision however I hope you feel supported by your Oncologists support - I was 32 at diagnosis (and triple negative - the opposite to your diagnosis!!) and the chemo knocked my fertility around fairly roughly. Biologically it is like I have advanced 10 years!
I have felt guilt around wanting another child however I am very settled with it now - the reality is that you still want the same thing post cancer diagnosis as you do prior to cancer, it is just that that is the massive thing in your life that now affects your decisions for your future! We are both very blessed to have our beautiful bubs, of course, but to want another takes nothing away from that - so plan hard for the future and be good to yourself. The decisions you make today are for today and we can only cross fingers and hope for the best right!!!
Take care of you and your family, good luck with the chemo!
P.S - I ended up having IVF following all of the treatment etc. and my fertility had dropped, every situation is different however dont I wish I had a fairy on my shoulder at the time telling me what to do!!!
Thinking of you, Louisa!