At 43 you may well be able to work right through. You've got a plan, which certainly helps, and if you have supportive people around you so much the better.
Do have Plan B up your sleeve. It's not unusaul to get the wobbles up during chemo and, unfortunately, the things that send the whole show off course are beyond our control.
If you are in a position where you can juggle your days around to accommodate any issues that may come up it would be great to find out exactly how flexible the business is prepared be. Have a frank discussion with them about what sort of notice they need from you if you can't come in and what might happen if you need to work shorter shifts.
The other thing to keep in mind is your colleagues and clients. I worked right through BC version 1 when I was your age. I felt a bit crappy at times but the people I worked with, and the clients, ( I worked in a library) got pretty stressed if I turned up looking like the walking dead. I was on a contract at the time so I was under a fair bit of pressure to be there and, as I was coping, there was no way I was giving up my job. Yes, I was constantly told how ''brave' I was but it did put extra pressure on those around me. I didn't ask for favours, but you do need to be aware that people get strange ideas in their heads about what will be helpful. The public...don't get me started. The things they say....
Anyway, get those big girl panties on and have a crack at it. Just remember to be kind to yourself as well. Marg xxx