Depression in early pregnancy

It seems that for the last two weeks or so my mood has been slowly declining. And finally I feel like I hit rock bottom. I'm tired all the time. My emotions are either absolutely nothing but numbness or extremely sad, enough to cry. I've been crying in my sleep. Me and my SO are having problems. I feel like I'm losing him. This pregnancy is taking its tool on me physically and mentally and I'm only about 9 weeks. I just don't want what to do anymore. I can stare at a wall blankly for hours and sleep all day. I'm crying while typing this. I just want to feel happy. Has anybody experienced this and it got better?