It’s good to know that you are in a relationship which means you have taken a step away from your past. Being in a relationship is a very beautiful feeling. As you said you have gone through a very rough past then now being in a relationship already shows how strong you are. You are trying to fight your past self and that’s commendable. Being raped at such a young age must be traumatizing and it’s understandable that you are scared. You are scared of getting physical and that’s okay. You have overcome half of your fear by coming into your relationship. It’s not easy to forget all your traumas and past and your partner will understand that. I am sure your relationship isn’t based on getting physical. You will overcome your fears but surely it will take some time.