Prenatal depression

I am just not getting out of this miserable state... I thought that after the first trimester of start to feel better physically and the rest would improve as well, but I am still in this unmotivated and sad state. I feel like I can cry all every day. I’m 16 weeks and have a 5 year old at home with me. She starts school in september and we just moved to a new house in a new neighbourhood outside the city in the suburbs. There have been so many huge changes lately and I don’t have a daycare for her anymore so she’s home with me. I am constantly worrying; about which school to put her in, if I am stimulating her enough, which brings along a lot of guilt because I know I’m not. I’m too tired and depressed to want to do anything with her... and my boyfriend is working night shifts and working hard so I don’t see him much and he sleeps during the day most of the time... and I just don’t even want to talk to him. All he asks is what he can do and says things will get better but this meaningless to me. I don’t even know how to help myself let alone tell him how to. I just feel stuck and with nothing hut tired days and dirty diapers ahead of me. This pregnancy was planned- we bought the house to have more space for a growing family and now I just feel trapped out here. I don’t know what to do anymore.