I'm still not sure whether it's fear or not, but something like ADHD would not explain why it only happens sometimes ... or would it? Because there are times (like several weeks) when I'm perfectly fine, then there are times when I can't get anything done, and there are also times when only specific situations trigger this inability to think. It seems related to certain fears, like for example I could imagine a fear of making decisions or a fear of living alone being involved. The only thing that doesn't make sense is why now. Nothing changed before it got so bad. :S