Pregnancy Scare

Soooooooooooo im terrified right now.im three days late on my period and im scared pregnant. I haven't experienced any symptoms of pregnancy like nausea but i do feel like im bloating. The last time i had sex was may 17. I dont know if im just late or im actually pregnant. Im 18 and live in a very religious household so i need someone's help. Im going off to college soon, i cant have a baby. Please advice.