So i have a seriously important period question. PLEASE HELP ME.?

my period isnt due till the middleish of next week, and ive been having gas. i;ve heard excessive gas is related to pregnancy and im scared out of my everloving mind. i just cant be pregnant guys, im not ready for this. i really am not ready for motherhood. i havent had , all my boyfriend has done is finger me. i have cramps, but is that just from the gas? or from my impending period? please tell me im not pregnant. im so scared guys. seriously. please please pleaseee tell me im alright. i usually get my period after my friends get theirs, and they havent had theirs yet, should i be worried? please tell me im okay...