A.G.
Well anytime you have unprotected sex there is always a chance of pregnancy so yes there is a chance. But if you have been having regular periods at a 28 day to 34 day cycle then you wouldn't have ovulated yet in order to get pregnant. You usually ovulate around 10 to 14 days into your cycle. So just see what happens. You can get a test and take it up to 5 days before you are expected to have your next period although if you take it that early there is a great chance of a false negative. I would just wait and see if you actually miss your period or start to be a day or two late. Then get a test.