You aren’t “crazy.” You are a traumatized person who is responding to a long history of abuse in one of the ways that people do. Please take your letter to your therapist. If your therapist doesn’t know about these symptoms, she can’t be as helpful as either of you would like. What you are describing might be consistent with Dissociative Identity Disorder but I don’t have enough information to make that call. Your therapist does.
I’m very glad you are taking care of yourself by working with a therapist. You deserve to sort these things out and to have a much happier future.
I wish you well.