What are the chances of getting an STD if..?

Well I'm honestly scared, recently about 5 months ago I broke my virginity with unprotected vaginal sex for about 15 seconds or less (I didn't really wanna have sex without a condom therefore I told her to stop, then she stopped and I didn't come inside her). Now I don't know if she's infected... show more Well I'm honestly scared, recently about 5 months ago I broke my virginity with unprotected vaginal sex for about 15 seconds or less (I didn't really wanna have sex without a condom therefore I told her to stop, then she stopped and I didn't come inside her). Now I don't know if she's infected or not (she told me she has had tested herself previously saying it was Hiv negative) but I'm not sure.

What are the chances of developing an STD if all of the above happened?
Plz help I'm really scared. :(
P.S I'm a Male
2 answers 2