Hi Elly.
I blocked out a rape, completely repressed it to the point it was as though it had never happened. Remembering it has been awful for me. I don't know though, maybe it is what you need to do to be able to move on.
For me, I think I would have been better off never remembering. However, I wasn't in a safe controlled environment actively trying to remember so that I could heal either...I was just bombarded by an event I had no knowledge of. It was pretty rough, though that rape isn't the cause of my PTSD. If you are going to try to remember, I recommend being in a safe place, and having someone with you like a therapist who can help you if it gets too hard.
Take care, and good luck.