Yes, totally. I'm glad you asked this too, because I've been wondering about this myself. In my experience, anxiety leads to forgetfulness, messing up days, losing track of time, misremembering things, NOT remembering things and so on. Sometimes the day blurs into itself, so no memory has its own space, and everything is all confused. On other days, when I am able to concentrate, the concentration becomes ... brightly focused. So I do one thing for a long time and forget everything else. Quite worrying and occasionally embarrassing... >_<