Loss of motivation is a component to depression yes, as is sleeping too much. I am pretty sure your circumstances are situational. I too have had some struggles with this after losing it all in the recession a few years ago. I find that allowing yourself to fully go into it helps it pass more quickly.
What we resist persists.
I am strongly opposed to using anti-depressant meds unless one has brain chemistry issues. Situational depression is just that, situational and when your situation changes, so will your mood and energy levels. Getting excited about doing mundane household tasks doesn’t motivate most people and you are experiencing a lot of stress at this time.
I would just say to make sure you are eating and resting well and do what you feel like in the moment. Maybe take some extra supplements, go for a walk, do some light exercise and don’t judge yourself.
Your responses are normal to a difficult and life changing situation and it may take awhile to find your equilibrium again. Personally, I don’t think therapy the answer here.
A therapist can’t find you a new job, and all the meds in the world won’t change the situation, it is the situation that needs to change and that may take time. You are grieving a major loss and there is no formula for that.
Maybe just set some small daily goals and after you achieve them allow yourself to just be.
Remember we are programmed to be doing all the time instead of just being, and allowing ourselves to just be is a very uncomfortable thing for many.
Best wishes from she who has been there, a lot, this past 3 years since my world shifted after years of stability and predictability.