Wow... I just spotted this thread... In my case it started with grammar/spelling difficulties (I've never had any problems with it before). But at the time I was learning another language very intensively (used it more often than my own) so I blamed everything on that... I started college in October (after a 1,5 year long break) and I just can't focus on anything, have trouble memorizing, remembering things, understanding and solving problems, short attention span and so on... I used to be a top student and now I can barely manage not to fail every class. I'm not on meds, don't do drugs or drink alcohol so I can't blame it on these. Now I can see I'm not the only one...