Over the years the girl child has been faced with series of teenage unwanted pregnancy which is basically due to inadequate information on when, how to act after sex. 

NB: ​If you're pregnant, you may notice early symptoms of pregnancy soon after becoming pregnant. However, not all women have these symptoms, and even if you do, that doesn't necessarily mean you are pregnant. If you think you’re pregnant, the best thing to do is to take a pregnancy test or get tested by your doctor.

These following tips will help you.

1. Think about when you last had sex. You must have had vaginal sex to be pregnant. MouthAction doesn't count in this case. Also, consider whether you practiced safe sex . If you weren't on a birth control pill and didn't use another form of contraception (such as a diaphragm or condom), you have a much higher chance of getting pregnant

It actually takes about six to ten days after you have sex for the fertilized egg to start the implantation process, which is when you officially become pregnant. That's also when your body starts releasing hormones. A pregnancy test is most accurate if you wait until you miss a period to take it.2. Notice when you've missed your period. A missed period is often one of the first signs that you may be pregnant. If you go past your expected start date by a week or more, that could be an indicator that you're pregnant. If it's been more than a month you saw your period last, it could mean you're pregnant.However, this indicator isn't foolproof, especially if you have irregular periods.
3.Watch for changes in your breasts
follow link for remaining steps

https://asehappen.com/2018/02/10/9-easy-ways-to-know-if-your-pregnant/