I am currently going through my second cycle of FEC chemo. On day 5 and there is no way I can work until at least day 14 after, I can't even drive until day 10 as I am shakey, blurred vision and have no concentration. I did manage to do some mornings work last cycle, but with a Neulasta injection this time it will be an unknown again.
It is indeed an unknown, how your body will react.
I was also in the position where my white blood cells were very low so chemo was delayed, not a great situation to be in if you are around a lot of potentially sick people.
Some people do work through and have fewer side effects, but perhaps you had best investigate a plan B in case you can't, such as Centrelink payments or whatever you can access.
Your body really needs to be taken care of through treatment, and you need to be as stress free as you can manage.
Good luck and I hope you get through it as easily as possible.