How to deal with a horrible BOSS.

So my boss is 65 never been married doesnt have kids. so she has had a issue with me since i started working there, shes got a issue if my kid gets sick when i get sick, she doesnt ever allow leave, so my grandfather passed yesterday, and i haven't been to work, so one of my colleges informed my about the things they said of me, stuff like ive been a problem since i got there and ive got a bad attitude and stuff. but she doesnt treat anyone with respect but she expect respect in return. im probably going to get shit when i get to work. i am pregnant so i cannot resign. she has her favorites who can do whatever they please, and i always do my work to the best of my abilities what do i do, how do i handel this woman.