Cathy, I had CK, not surgery, but I had the same problem for a couple weeks after treatment. I couldn't remember words and I also typed words with reversed order of letters (like a dyslexic person). A friend of mine who is a cancer survivor (not brain cancer, but cancer of the anus) said it's a common temporary problem after getting chemotherapy, too; she said cancer patients call it chemo-brain. Don't worry about it; it should get better over time. Based on how articulate your post was and the lack of typos, you seem to be doing amazingly well considering how recent your surgery was.
Anyway, best washes. Waffles? Wascals... um, wishes. Yeah, that's it, best wishes... for continuum heeding... continued heckling... um, healing, yeah, that's ripe, uh, right, continued healing. Best wishes for continued healing.
Whew,
Tumbleweed