Hi Sarah (`・ω・´)”
I want to say "I used to" feel the same way you say you're feeling now-- but I'm 24 and I still doubt myself, every day, even though I have chosen to live as though my dad did do the things I dream about him doing to me.
It's hard to tell myself "always believe yourself," but I know from reading what you have written that I believe you. I don't think you would have these feelings out of nowhere. It's terrifying, beyond terrifying to think that these things really happened; that anyone who is supposed to love you could do those things to you. But the bottom line is-- even if people say or imply that you could ever make something like this up-- you would never ever make something like this up.
My mom also said she didn't think I had the "signs of abuse," but I think that this is wishful thinking, unfortunately. You've shown the signs by reaching out for help in the first place.
For me, I remember things most clearly after I've felt okay to cry, rage, grieve over "nothing," with someone who listens to me without judging. It can be really hard to find someone to do that with, and even so I often find myself re-repressing memories I thought I'd cleared up. But I've also found, on my own, that if I let out these confused, ashamed, mixed up feelings on paper-- writing, smearing an entire page black with ink-- anything that leaves physical evidence behind once my feelings have passed-- sometimes the memories come back.
Please don't ever dismiss yourself for not remembering something clearly. If you feel something, that's legitimate. We can't remember things clearly when they're too much to bear anyway-- so if it helps, you can think of the lost memories as a kind of proof by absence. Like blank spots in the sky where you know there should be stars.
My heart goes out to you. Are you safe? I hope that you can find the safety and the help you need. I ran away when I was 19, finally. It's terrifying being alone, but I'm glad I made that choice. If I could talk to myself then, I would say--
Always believe in yourself.
You have the right to express all your feelings, positive and negative.
It's going to be okay.
And I believe you, even if you don't right now.