Feeling stressed out about my mom.

Crystal
Hey ladies I need a strangers perspective. So my mom lost her job and lost her house so she's been staying with my grandma, my aunt who's on disability, and my cousin who is mentally ill. All they do is start drama and get my mom upset. So she calls me and gets me all stressed out knowing that I am pregnant and that stress could put me in preterm labor. I want to tell her I can't deal with this right now but I don't want to hurt her feelings, plus she's the only parent I have left. I'm so confused, any help would be much appreciated.