pregnant??

so i’m quite young. not looking to get pregnant. my boyfriend and i had sex on april 29th. we used a condom. i’m not on birth control. he didn’t cum during the sex. my period is normally late so nothing new when it didn’t show. it is late now. i had diarrhea for 2 days(i read that can be an early pregnancy sign). and i had a little stomachache today. i know i’m most likely not pregnant i’m just afraid. help??