Do you think im pregnant?

i am 15 and i had unprotected with my bf and im afraid im pregnant he says he didnt com in meh but idk if it is true, i have had odd periods and cramps even after i had my period. but it has been like going on for two months like this and i cant get a pregnancy test or put on bc cuz my parents would flip and i would nvr leave the house agein... plz help meh do you thimk i could beh prego