Hi Juliana,
You gotta start somewhere. You may not get it all done by the weekend but taking it in little doses may be better than trying to do everything at once. Take one task at a time-and eventually it will all get done. Otherwise it's just going to keep piling up becoming more and more unmangageable.
If all else fails, clean it once and then hire yourself a cleaning service to keep up with it. Or don't clean it once and hire someone. I work as a cleaning woman and I can't tell you how many numerous of clients have told me that when they knew I was coming to clean they felt "inspired" to clean before I got there so it wouldn't be such a mess for me and also after I start cleaning for them, they enjoy the results so much they start wanting to keep it straightened up.
When my place is messy, it drags me down and makes me feel depressed-I have to clean it otherwise I start to feel "crazy".
Your lack of sleep may be contributing to your lack of motivation. Can you take a sleeping pill (over the counter) at a certain time so that within the next hour you'll be sleepy and go to bed when you're supposed to?
Can you clean at night (little doses) when you're feeling better?
I understand your not wanting to straighten up. I come home from cleaning other people's houses and it's the last thing I want to do within my own home.
They have healthy meals you can throw in the microwave. Can you compromise and get healthy microwave food? Or eat soup. Soup is really healthy. I get tons of soup and when I cook it, I just eat it out of the pot so then I don't have any bowls to clean. (I'm single and live alone-I can get away with it.) Know what's really good? French onion soup with pieces of roll in it and mozzerella cheese. Yum!!! I love it!
Anyway, good luck.
You'll feel better if you just get it done. Do something, do anything-just really make the effort because if you don't then you'll feel badly about yourself.