You came inside me?! That's not good!!!

I knew this would append sooner or later. We've been having sex for awhile and the last times we were carelless about protection and this time append. My stupid brother didn't hold it and came inside me, I told him to be carefull but he didn't took if out on time now we are both desperate, I took the "day after" pill but until I don't do a pregnancy test I'm not 100% sure.