I am at a loss.

Background story, my parents got a divorce last November. There has been a lot of drama, abuse and broken trust between my mother and I as well as between her and my younger sisters. I am married and my husband and I have been trying to conceive a baby for about a year now, with no luck. I have bad anxiety and I have been feeling really let down suffering depression, hair loss etc... I am from Texas and I feel like that’s where I need to be, I have family there as well as freedom from the abuse my mother is putting me through. Yesterday I found out my 40 year old mother is pregnant. She uses hard drugs, smokes weed and drinks. (She used to be an alcoholic) that started after my grandma passed away. (Her mother). I feel angry because she doesn’t even care about the 3 girls she has now. She’s been sleeping around. She is bipolar has depression isn’t on meds doesn’t have a stable home, no job. But she wants to keep the baby. (Her choice) but in my opinion it’s a very selfish choice. I guess maybe I’m just feeling like I need to vent because I’m at a loss, I feel defeated. I’m absolutely heart broken that another child has to go through this.