My world is falling apart I feel like I can't be pregnant anymore

We were just told my moms cancer spread and chemo is no use anymore and basically her time is up. There's no words to describe what I feel. I'm 8 months pregnant and I want to be done. I am so aacared I am hurting the baby the severe emotion distress I'm experiencing is only going to get worse since my mom still doesn't even no. I'm cancelling my baby shower this Saturday. I had my husband call my doctor just to make sure there's nothing to do. I'm really just posting this to vent- I literally can't speak about it to anyone.