Many breast cancer patients have experienced "chemo brain" after having chemotherapy. I've been asked so many times if this is real.
Unfortunately it is -- there is a discussion on www.inspire.com about Chemo brain, and the Spring 2016 issue of Cure Magazine has a great article all about this problem.
Doctors call it CTRCI - Cancer treatment related cognitive impairment.
You can read this article on line - and subscribe to Cure Magazine free on their website.
You aren't going crazy -- we all learn to adjust to our "chemo brains"
and this article gives us some really good hints on how to cope.