I would suggest waiting until you are a week or two late from the day you were supposed to have your period. If you still don’t get your period by then, invest in a pregnancy test at the drug store and/or go to the doctor. Try not to worry or become too stressed over it because that can also delay your period causing you to worry even more. I’m sure you’ll be okay, periods come late sometimes. It happens.
But next time be more careful and use protection if you don’t already do so. Condoms are the most popular protection to use, and they protect not only from pregnancy but from stds. And if you really don’t want to use condoms, I would highly suggest going to the doctor and getting birth control pills. Using both condoms and birth control pills are the safest way to ensure 98% safety and protection. Sex is great and fun but it’s also a big responsibility, and both people should be mature enough to get the protection they need.
Carmen Rodrigues, 34 Pieces of You