if this is the combined pill and designed to be used with a weeks break then it should cover you for the week break.
Unless there was any reason for the protection to have been compromised ie, you hadnt taken them all correctly or youd been suffering from a bug or taking antibiotics then you should be safe.
You wont really be able to find out until your period does arrive or if the next one is missing, at that point take a test.
If you are really concerned and think that its a strong possibility then stop taking the pill until you get your period and then start again as if a new course, making sure that you use condoms in the meantime as you wont be protected.