depressed while pregnant 22 weeks

I constantly feel like shit like I don't even want to get out of bed in a morning and feel like what's the point about every thing I feel so down and feel like what if I don't feel back to my normal self when the baby is here.
I also have a step daughter before I was pregnant we were so close and now I feel like I can't even go near here and she is awful but I don't no if it's me 😢