@Helen40
Sounds like you didn't have enough time to process information and it's all so overwhelming. Don't blame yourself saying you should have known as there's a lot to process and come to some form of confidence in what's happening and acceptance.
It all takes time!
This link may help
https://www.bcna.org.au/understanding-breast-cancer/treatment/breast-reconstruction/My treatment was in the private system and my surgeon had 2 breast care nurses who were extremely helpful. Mastectomy in May with expander inserted. Had fills along the way, he suggested panadol beforehand. My changeover to implant was October. Would've been sooner however I had an infection which turned out to be topical. My breast is now allergic to Sorbolene.
Take care