They went through my mail

Yesterday I received a letter in the mail from CPS (child protective services) I finally had the courage to speak up about the abuse my  ex put me and my daughter through.. My dad opened it and when I got home he started yelling at me telling me I'm a liar, I was never abused and started brining up how I was crazy because I have depression/anxiety.. He also said if anything I was the abusive partner because that's what "crazy people do" my ex would shove me/yell at me in front of them.. But he still doesn't see that as a bad thing...  The most hurtful thing that he said is  that if I ever took him (my ex) to court he wouldn't be on my side, he would be on my exes side instead of defending me. My mom just sat there and agreed with everything he said and also won't believe me even though I've started going to therapy, they're telling me I'm just a drama queen that's wants revenge for his abandonment.. I'm so hurt And embarrassed I don't even want to look at my parents or talk to them (we live in the same house) Theyre also not trustable so I KNOW the rest of my family will find out making this 10x worse for me. I don't know what to do... I feel so alone...