We Had Sex At 8th Of This April And My

we had sex at 8th of this april and my last period was 8th of the march, at first when his penis get into me at that time he had not been ejaculating. is it possible to get pregnent, i checked it 2 times and the result was negative but i am late to my periods as it was the same date when we did sex. do answer!
And i do not have any symptoms of pregnency, til today.