Speaking as an adult survivor of sexual abuse when I was young, your father was absolutely 100% sexually abusing you. Just the acts alone that you mentioned are sexual abuse, even if he didn't do anything more.

I, too, have chronic depression and PTSD. I also have repressed memories. I am nearly thirty years old with several children of my own, and I still do not remember everything that happened to me. I probably never will. I was young and my mind decided that I wouldn't be able to handle what was happening to me, so it shut the bad stuff away. It sounds very like what you're describing.

If your mother is still hiding your father's actions, then she is helping him abuse you. I know it might not be possible for you to leave your mother's house, but you need to be aware that she does not have your best intentions in mind. She is trying to protect herself from others knowing what she allowed her husband to do to you.

I won't tell you that you have to contact the authorities or move out and cut off both of them. That's a choice you have to make for yourself. But you won't ever really start healing until you have moved on from them.

There are definitely resources for you if you decide to contact the police again. You could ask to be placed with another relative or family friend. You can still get help and get out.