Adjustment Disorder
Agoraphobia
some others to add, but these are 2 for sure I am dealing with. If the loss of a loved one or spouse is not giving someone medically a disease, like Grief not being a diagnosable condition, and it's not exactly depression.
These are 2 anxiety driven conditions at least. Agoraphobia I guess is kind of a general anxiety condition, but it is caused by the panic that one would get from a change or trying to deal with a dramatic change like losing one's companion or spouse in my case.
More maybe on this later, although I am more likely to make a YouTube video soon going over more of this stuff and a lot more of course.