Scary pregnancy announcement to parents

I'm 25 and 16 weeks pregnant. Most people know about it except for my parents because they are mentally and emotionally abusive and toxic. I am so terrified of telling them because their reaction will make me sick or hurt my baby. If I try to walk away they would probably hold me down and hit me. My mom said she would kill me if I got pregnant without her permission since I never had a traditional wedding or finished college. I have only 12 credit left that I can complete so it's not a big deal. They also hate my husband because of the country he is from, and the fact that I did not get married at a church in a white dress. Idk how to tell them or should I have a security escort? I really do not want to get sick and hurt this baby due to the screaming and emotional/mental abuse.

UPDATE: The reason why I feel the need to tell them is because of pressure from my sister, cousins, uncles, etc. They keep telling me if I do not tell them they will be even more upset and the situation will get worse. My mom may feel so upset that I never included her in the sono appointments or have her enjoy my pregnancy once she gets over the initial shock. She is the supportive type after she gets over being upset. My dad on the other hand is scary and unpredictable.