My Period Schedule On July 14. But It Has Been

my period schedule on july 14. but it has been one month i didnt get my periods. i had unprotected sex on july 17. i consulted doctor and done pregnancy test on 11 august. i shows negative. im consuming cyclenom e and p for two days. doc said that i will get period with in one week. if i didnt get my period, means that am i pregnant??