Don't feel alone, my oncologist calls it chemo- brain. It is extremely common, but I do not know if the reasons are clearly understood. I found that time is a great healer, however using your mind to read, do puzzles,write letters was the best remedy for me. Sing out loud and practice tongue twisters. If it is really creating a problem to communicate on a daily basis ask your Dr. about cognitive retraining and therapy. It will get better as your strength and stamina return. Just be good to yourself and be forgiving of your own mistakes. I am four years post chemo and am finally starting to feel normal.
Paulina