PLAN B PILL LADIES HELP?

ladies i need help i am only 17 years old i am worry now on may the 17 i had sex without condom and the next day i take the plan b pill but on mat 24 i had sex again without condom that time i don't take any pill so on june 1 my period should came and now is june 20 and no period yet only cramps so i take a pregnancy test and it was positive but i don't feel any symptoms well only like nausea that's all everything is normal.do i need to take another test?do i sound pregnant?my boyfriend don't want that bebe if i am pregnant i don't know what to do.