Dear Tilleycat,
Great decision. I take it you are still waiting histopathology and recommendations re Chemotherapy.
I would like to say, not everyone has bad side effects of Chemo. I had some side effects, but all were manageable.
I had no nausea or brain fog. I haven't heard that it is permanent, just temporary.
You won't know how you are until you try. Here's hoping Chemo won't be indicated. If you do have Chemo, make sure you communicate well with your Dr's and nurses. Tell them any issues or concerns, they may be able to offer treatment or suitable advice.
All the best.