I had first time sex on 5th august ,even though it was protected sex,I still took postinor-1 the next day.It was a first time for the birth control pill as well.But the next day my partner just put the penis in and dint come.Can I still get pregnant with that ? Also I had a heavy bleeding for 3 days right after one week of taking the pill.I am just panicking out at the moment.I have no weird symptoms except feelin hungry and feeling stressed.I took a home pregnancy test and it came to be negative.I dont know when to expect my periods next ? Could you help ?I had my normal periods last 23rd july,2013 and its September now.