That's a bugger of a diagnosis, @Brooke3006 - I am so sorry to hear this. My thoughts are with you as you got thru this next lot of treatment.
Gosh, if you are working whilst undergoing Chemo, I don't think it would be a good idea, to be honest if you are not taking food to sustain you. Water has absolutely no nutrition - other than to keep you hydrated.
Before trying this cleansing diet - speak with your medical team - at least your GP, but specifically your oncologist & others in your support team.
I'm with @Blossom1961 on this one - I just enjoy my food too much! ;)
Take care xx