Shall I Get Pregnant From Pre Ejaculate On Vagina?

I had got laid by my boyfriend but I did not let him penetrate because he was not wearing condom. Although he tried to enter, it means he did touch my Vagina but I stopped him. After some time I could feel some fluid around my vagina . I do not know what it was. Was it is his pre-ejaculation? I am worried can I get pregnant? I read about pregnancies without proper penetration and I read around three days after the whole thing. Had I read earlier, I could have taken the pill. I also visited a gynaecologist, she said that I don't have to worry. Moreover I am still a virgin. but I was expecting my periods on 3-4 th August. They haven't come yet. I am worried. Also I am patient of PCOS but since last three months I had been having regular periods after stopping medication because it did not suit me. Despite the talk with Gynecologist,I am still worried. Should I get the pregnancy test done? please help