I have definitely experienced this. Had horrible chemo brain but it is gradually getting better. My last chemo was 1.5 years ago and I still have some of the brain fog. Things I notice are forgetting words or being able to speak them. I think one word and a different one comes out of my mouth. I can NOT multi-task any longer and I used to be good at it. I have to concentrate on the one thing at hand and get it done. I tried to go back to school a couple of months ago (I lost my job during my treatments) and dropped out the first week because I could not remember anything from one minute to the next and the stress started to make my hair fall out.
I have been told to play memory games, which I did do on the computer. I really think it helped somewhat. Invest in sticky notes and white boards. I still have to write everything down or it does not get done.