@melclarity had a recurrence and I'm sure can add some wisdom.
How annoying and so frustrating ( and devastating)for you and just because you have been through this already it doesn't mean all the fears are not going to return for your future and children.
Your advantage of course is you know how to navigate the process. You don't need to decide about your reconstruction immediately if you don't want to. You can just remove what's needed, have treatment then decide.
I went through treatment with a Mum very similar to your story. We both are doing well 4 years on.
Keep talking, blogging helps. Understand your pathology and analyse the risk for and against treatment options. I looked at 15 year survival rates as I plan to be in that group at least. The longer time periods show the significance with different options.