Hi Rose,
I am not sure where is the line between depression and non depression regarding self neglect of myself. I have neglected myself for years. In my case, I think it is because of my education (i was trained to postpone my needs on behalf of other people's needs) and my low self esteem or self-love as I was raised by a narcissistic/ emotionally unavailable person. But there may be other factors, as well, including constitutional traits (things that originate in biological conditions). I really don't know but I am deeply deeply like this and it is like it happens with addictions: it will be always with me, I have to manage it.
Whatever the case, my self-neglect get worse during depression.
To me, the first thing is to get out of my house, and if possible out of my city for a couple of days. In this way, I get to break the cycle of spiraling down and down about self neglect. I have to do it before it is too late and I really sink in.
I don't know if this is useful for you. Maybe it is not.
Sending you a big hug.