I was able to work during my treatments. I had to take one day off every other week for my chemo infusion. My boss was also very flexible with me so if I had a doctors appointment in the morning, she would let me work late instead of having to take time off.
I think there is really something to be said for having to get up, get in the shower, get dressed and get out the door every day. I'm not saying it's easy, but for me, it kept me going and not allowing cancer to consume my life. I think it also helped me to have some "normal" things in my life when so much was different.
Everyone has to do what is right for them. If you feel like you can't work, then explore your options. Good luck to you.