Prenatal depression

I think I’m going through prenatal depression. My symptoms include not finding joy in anything, becoming detached from everything and everyone in my life including my sister who is my best friend and my boyfriend of 2 years. I love them both dearly but I feel like I have a void in me and a dark cloud constantly looming over my head. My boyfriend is constantly on my ass about cleaning the house because he finds it helps him when he’s depressed but for me all I want to do is be in our room by myself and sleep til I no longer feel like this. It’s like he doesn’t even care when I feel like this. I know I need help but I don’t know how to describe really how I feel or how to talk to anyone about it. Do I bring it up at my next prenatal appointment in September or do I not?