What I recall being most difficult about depression was the quality of "timelessness" that came in with it. It could be that you've been in that space for three weeks, three hours or three days but no matter how long it's been, it can feel as if you've been there and
will be there...
~ forever ~
I would recommend to those who are undergoing severe depression to keep an eye to a literal calendar. Whatever you are going through has probably not been going on as long as it *feels* like. Also, whatever is going on... it will pass. Your task is to hang in there until it does.