has this happened to anyone before?

long story short i had sex last month and got my period 5 days after. my period is now coming up this week again and for some reason i’m so afraid i won’t get it. has anyone had their cycle right after they had sex and then missed the next one? i took a test 25 days after sex and it was negative but i’ve been extremely tired, bloated, and cramping. any experiences would be great!