help only 17

Christina • I'm 17 just trying to learn things that I'm to scared to ask my mom lol

I have had unprotected sex but he used the pull out method but I think some got in. im on birth control for my acne but it's supposed to protect me. my period is next week ,my stomach has been hurting alot I don't think it's cramps I usually get the cramps the day of or before. he's not worried . my mom doesn't know so I'm asking on here plz help me