As a child (about 13 until moved out around 18) I was abused by my younger brother. I remember being punched in the face, he would jump on my back and try to choke me, back me into a corner while hitting and kicking me, chasing me around the house with knives and threatening to kill me, etc. Always assumed it was for no reason. Turns out later he had autism and I was a trigger for him (not at all excusing abuse, or blaming autism it just gives an explanation). It most commonly happened in the morning after my dad had left for work and before my mom woke up. Multiple times a week. 
I tried telling my parents and of course he always denied it. So they took a middle of the road approach assuming that he was rougher than he should've been, but I was just over dramatic. As we got older and I was away at work, he turned his abuse on my mom and she saw just how serious it was. He's since gotten help and is on the path to a brighter future. I've completely forgiven him and don't at all blame my parents. However....
Recently, I was talking to my mom about things and the abuse got brought up. She told me that, while things were bad, my anxiety has way over dramatized things and he wasn't nearly as abusive, and as often, as I remember.  Is my mom just subconsciously trying to hide how bad it was so she doesn't feel as guilty, or is it possible my anxiety is way over hyping things? I know no one can no for sure without being there, I'm just going crazy wondering if my anxiety is causing even more problems than I thought.