Family crisis during pregnancy

Alison
Ladies, I'm just really sad/stressed/scared. I'm 12w4d now, and with the exception of some rough patches of morning sickness and a nerve thing that I've been treating with chiropractics, everything's been going fine. 
Then yesterday, I was instructed by my bro- law to call my mom. She told me she was in the hospital, admitted so they can plow through all the tests quicker to see what was going on with some spots on her liver and funky blood work. After her first test, a cat scan, they found a likely malignancy on her colon and spots on her liver, breast, and ovary. She'll be in there until tomorrow for more tests and we won't get any biopsy results back until later this week. My dad is already in extremely poor health, and if my mom's sick, his care will fall to me and my sister when we're both working on our own children. 
This is just really a lot of stress and crisis to be dealing with right now, I know there's nothing I can do. How do I deal with this without becoming so overwhelmed it affects my baby?