Hi @Della These decisions need to be made but it's always difficult. Ive been through this twice myself and have had many discussions with others about how you weigh up the pros and cons and find the right solution for yourself.
One observation, those who decide they are not having chemo usually come to that conclusion immediately. It's a flat 'No.' right from the start. The fact that you are having such a hard time with this probably means that part of you is considering it as an option, unpalatable as that may be. If you need more time to listen to that little voice, that is OK. None of us like to be backed into a corner.
Sue has given you some excellent advice. Please get hold of your breast care nurse and have a chat to them. Yes, they are busy but you do need some help with this and that is what they are there for. You mentioned talking to another oncologist, that is also a reasonable thing to do, though from experience, you will get the same response from them. Good luck with this and listen to your heart. MXX