Stress and tiredness make us do the strangest things - and worry merely compunds the problem. I think you need to be checked out by your doctor but, seriously, Scully puts it well (as usual). As you know, I've had chemotherapy and that can make one's mind vacant! It's a nuisance trying to remember names and events - but then Claire, my wife, often misplaces things and says it's the result of her mind being too full, which it probably is.
Being a manager and having to look after me and the rest of the family Claire is under constant "pressure". While we are more civilised these days it has come with a cost. Life has sped up so much that we often meet ourselves coming back. It's a completre paradox, isn't it! We feel we have progressed - and we definitely have - but it has come at the cost of losing a slower pace of life and just being able to sit down and have lovely, in-depth conversation. Televison, computers, DVDs, these are all taking up our time.
If you can, sit down, unwind and read a good book. This not only relaxes you but you will also be training your mind through the written word, rather than being led along by, for example, film where we don't have to think but merely watch to see what develops before us. You also need to get a good night's sleep.
I'm sure you're no different to the rest of us. So relax and have a nice