Basically: I have depression. It was particularly bad last year and messed with my GPA. But it's undiagnosed, mainly because my mom keeps putting off taking me to a doctor for it (I have no doubt that it'll be diagnosed once I see someone about it). I've seen other people on here saying that they were able to notify the colleges they applied to about this as an explanation for some possible inconsistencies in their application. How would I go about doing this, and would what I have to say about my depression have any weight if I don't have an official diagnosis?