was I in the wrong?

last night my boyfriend and I went to the movies, on our way back we saw a motorcycle accident and no one was there to help anyone. we stopped and made sure everyone was okay, and some of them were in bad shape so I called 911. we stayed until the ambulance got there so we could make sure they were okay and so I try and control one of the girls bleeding. I called my parents when we left to head to my house and told them I was sorry and didn't call right away bc I was making sure everyone was ok and that I was on the phone with 911. my parents did not believe me and said we were just having sex, told me that I was a worthless piece of shit and that they were going to beat my ass when I got home and that I was never going to see my boyfriend again, they do hit me so I was terrified when I was coming home, my boyfriend even came in with me to make sure that I was ok and to show them we both had blood all over our hands and stuff and they still didn't believe me. they are treating me like shit and calling me their slave and are being very verbally abusive. am I in the wrong here? -------Update: i moved out and i am now staying with my boyfriend. he is so tired of seeing what they do to me and I'm tired of being put through it. I am a great person and I don't deserve anything they put me through if they try anything I will be going to the police. thank you everyone for the support!!