I have noticed that to, even hard for me to read and comprehend simple stuff now at times...whereas I used to read way above my level, take a lot of information in and retain it and could concentrate and focus pretty well fairly often especially if something caught my int rest...I mean I always had some slowness like have never been the best at keeping up with everyone else and was always horrible at math but not to the level it is now. I just hate feeling like an idiot because my brains not working right....I am only 23 so I know it's very unlikely to have to do with age in my case.