@Matt - never feel embarrassed on here! We're all here to help and if you are up in the wee hours and get on the forum there's always someone nearby that will answer a question
What type of Breast Cancer do you have? This is a link from the BCNA website to help you understand
https://www.bcna.org.au/understanding-breast-cancer/types-of-breast-cancer/also you have mentioned surgery so here's another useful link, Reclaim your curves site information sheet, what to pack for hospital as well as other interesting information
https://www.reclaimyourcurves.org.au/information-sheets.htmland another one on Nails
https://www.bcna.org.au/understanding-breast-cancer/treatment/chemotherapy/nail-changes/Take care and best wishes