Can anyone pls reassure me that depression can affect memory and concentration? I woke up yesterday feeling horribly low (still do) and I've found recently that I can't concentrate and I repeat myself as I don't remember what I've said! I also read whole paragraphs of books and don't take in a word. I'm no spring chicken but not that old (yet) so am praying it's not early dementia! I think this sadness is caused by bereavement, my beloved cat a month ago.