I NEED HELP AND ANSWERS PLEASE!!

Recently me & my boyfriend did the dirty and before I told him to put a condom on, he went in raw. It was only for 20 seconds until I told him to use protection. I am still very scared of pre cum because he was dry-humping me before hand and when I stood up while he was getting a condom I felt super wet down there. Not sure if I was just wet or maybe he had pre came without knowing. I would really appreciate some advice and what I should do in this situation because I ovulate in 5 days!! Pleaseee lmk!!