i am 21 years old..i had my period on 8th feb n ends on 14th feb. i had sex on 19th feb wit my bf and NEVER had any sex after that..during sex,my bf put on a condom and ejaculate outside of me. however before that,he masturbated in the toilet..i also had my period on 9th march and 7th april. 2 weeks before i had my period in april,i felt cramps in my stomach n headaches..may i know does that mean im not pregnant?? i really doesnt want to get pregnant..plzzzzzz help me anyone??