How can I do to recall the memories of ual abuse?

I know it might be painful to recall some memories like this, but still, I wanna know exactly when happened when I was young. Sometimes, I can remember something, especially when I'm really tired, but then it gives me a big headache and I feel so scared and I shiver all over. I know something bad did happen what I was young, I just couldn't recall all the details. I don't wanna be hypnotized, is there something I can do to recovery all the memories?