hi, hoping someone can help me. 

i have a long term boyfriend, however i went on a hens night july 7th and had a one night stand. the guy pulled out (i know theres still a possibility of getting pregnant tho) i cant remember if i had a period after that. my edd is may 14th, my conception date (roughly) is said to be around august 7th, who is the father? im almost certain its my boyfriends but wanted to know what anyone else thinks?