I had that where I lost track of entire days. I've always been one to be done with projects at work on time or even before they are due but with PCS, I was getting them done days and days late. I would just loose track of what I was accomplishing/or not accomplishing.

The days wizzed by with what seemed like very very little done - yet i was completely absorbed and "busy" with what I was doing.

This has gotten much better for me as my memory has returned. They seem related.