Most of the times you have to be halfway in between periods to get pregnant. Most women cannot get pregnant during or directly before or after their period. If you are pregnant, you will not have a period, unless something is wrong, or unless it is implantation bleeding, but that occurs around a week after conception and is usually lighter and always different than a period. You can have heavy bleeding just from having sex.

You can get pregnant at any time during the month although its much more likely at certain times. Some women have their periods throughout their pregnancy so wait till next month and see if you have your period and then if you dont then test.