Adult sexual abuse survivor

As a child, age 4-12, I was sexually abused by my father. As a child and a teen, I put off most of my emotions. Now, as an adult, I have flashbacks from the result of PTSD, chronic depression, OCD, and anxiety disorders. Everyday is a struggle for not only me, but also my loved ones. That includes my family, my child, and my fiancé. I've sought therapy several times but it doesn't help. I'm not religious, at all. I don't believe in God or prayer. So it upsets me when people preach that I should "let go and let God". Any help or advice is appreciated, but not from those who have never experienced sexual abuse. You have to have lived through the pain to understand.