I don't think you got pregnant you guys did it the right way and made sure you were safe.
just relax and wait it out a few more days.
our bodies are not machines and mood, stress and physical activities can be interfering with your cycle tremendously.
Good luck !!!
Periods can be unstable. Just becasue you are nervous, or thinking about it, may delay it. You did nto take any risk, from what you are saying, so just relax and you will see it will come!
It is possible that you are just stressed out and that is causing your period to be delayed. If you had unprotected sex anytime before that it is definitely possible that you are pregnant. Try taking a home test and if it comes out negative then you should be in the clear. It is also possible that you ovulated later in your cycle and in fact got pregnant when you thought you were supposed to start your period.