so my boyfriend and i had sex 1 week ago and i havent felt right (my stomach hurts in the day) for the past 5 days. it was for like 10 minutes and we dont know if he precum. he did not go all the way though. my period is coming up but i'm still scared that i'm pregnant. i took a home pregnancy test 4 days ago and it said that i'm not pregnant. i'm really scared and dont know if im just stressing which is causing me to feel sick or if i'm actually pregnant. help!