Have you ever had a one nigt stand ?

Well a little over a month ago I had a one night stand with some random guy , I was out of town with my friends and met him at a bar we hooked up , I left never seen him again , I don't have his number , don't know his last name, nothing! and the most depressing part about it is that I just found out that I'm pregnant . 😣 I know his first name , well the name that he told me . im not even sure it's his real name. Either way I'm screwed .