I've said this before, but I call this sleep inertia. There's a point where a body at rest wishes to remain at rest. I agree with BirdDancer that setting a sleep schedule is a good idea.

Have you tried exercise over the past few days? I know you live in an apartment and you aren't always comfortable getting out, but the sunshine will help if you're up for a walk. If not, try doing some boxing moves. They engage your core, your legs and your arms and you can do it without making a lot of noise that might disturb your neighbors. You can imagine you're fighting the depression. I find that forcing myself to get up and move frequently helps me when my spirits and my energy are low. Just try a few 10 min intervals throughout the day and see if it helps.

I'm sorry you're feeling this way. I can appreciate how deflating it must feel to know this cycles and you'll be in the same boat again one day. You can see the pattern though and you know it doesn't last. You can focus on working to find better and better coping strategies each time. Maybe think of it like a challenging game of figure out how to kick this depression's *****. Hopefully it will get a bit easier to handle mentally and emotionally each time it cycles.