Thank you for your query at DoctorSpring.com
I understand your concern.
No, your periods are just delayed and there is no chance of pregnancy, since it has already been ruled out by the tests. You can wait for 1 more week,and if you still do not get your period, please get your FSH/LH levels checked, and your thyroid profile done. Based on these reports, if required further tests can be advised.
Hope this was helpful,