Hi! I had my first period last aug. 13.. I had sex with my best friend on 19th of same month. On 21st aug to sept 19th, my boyfriend and I were doing unsafe sex since we wanted to have a baby already. Now I'm pregnant.. But I'm not sure who the father is.. Im having period monthly.. Is there possibility that it's my best friend?

Yes... you have to have a DNA test done to know for sure

PLEASE don't tell us you decided to get pregnant right after your first period. That means you are what, 13 to 15??

Very good point joypulv... I had assumed she meant to type last... if it is exactly as typed and you are right... there is a whole other can of worms opened due to age with risks and possible complications.

Conception dates are an educated guess by even the best doctors... to a dates with a window two weeks before to two weeks after... meaning anyone you slept with that entire month might be the father.