We can't tell you for sure. That's great that you used protection. Keep in mind, however, that protection is not 100% effective. So every time you have sex, you run some risk of pregnancy. Be aware of that, but don't let it scare you either. Many methods of birth control and very effective when used an intended.

It's very possible that your period is just late. Tough to say. A lot of women have irregular cycles. Also, a lot of things, like stress as you mentioned, can make a period irregular even if it was always regular before. Worrying about being pregnant can definitely make your period late.

You'll have to sit back, watch for your period, and take a test if it still does not come.