I'm really sorry for the situation. CALL your gyro, get prenatal, ask someone to bring home healthy food, ask for help when you need it, and allow unself to relax unwind and think, write in a journal. I had a super stressful first pregnancy and baby came out healthy
I'm so sorry you're going through this sadness.
Your hairloss is likely a result of having a newborn.
Looking through your profile, you were wanting to get pregnant again back in January, so it sounds like besides your dad's sudden and tragic illness things in your life are going well and are stable.
You'll be fine, but it's really hard to lose a parent and watch them suffer.
Best wishes.