PLEASE help tell me when I ovulated

Are you pregnant from the day you had sex or how does it work please I’m 15 I’ve got myself in some sh*t I slept with 2 people one at the start of the week and one at the end it’s saying my ovulation point was closer to guy 2 but does that mean guy one could fertilise my egg first because his sperm was waiting ? I do want to have this baby even though I’m young but i really want guy 1 to be the dad