Bump on a log

What do you do when your depression makes you "lazy"? I hate this so much! I feel like I literally do not want to do anything but just lay around or nap. I feel like my house is a disaster and I want to clean it so bad but I can't, I physically cannot muster up enough energy to do more than put the dishes in the dishwasher and I feel like I have to force myself to do even that because obviously a sink full of dishes is gross and starts to stink. I feel like I can't just blame it on depression because I'm also early on in my pregnancy so I have no energy either. But mostly I think it's depression, I just need a break from all the housework, from life really. I take a break and it just gets worse and worse. I don't know what to do :( I don't take any medication, I was self medicating using marijuana and it usually helped but I had to stop that obviously because of getting pregnant. I hate feeling this way, hate feeling like a bump on a log but I don't know what to do to make myself do something. I know I have a looooong way to go til baby gets here but I have this urge to want to get things done and I just cant do it. I'm lost and don't know what else to do. I feel fine usually until I come home from work and then it's back to feeling like crap. Feeling like crap about not wanting to play with my daughter, crap about not cleaning, crap about sitting on my ass, just feel crappy about myself in general at this point. And it isn't even a self esteem type of feeling or feeling sick, I don't know how to explain it... just in general feel like crap