Does Using Primolut Last Month Cause Changes In My Expected Periods Dates ?

Sir, My name is anjana and my age 23 .I have regular periods since from begining. Got married in Nov 2011, now we are expecting for pregnancy ..Last month in June 2014 I used promolut n to postpone my periods and a used 6 tablets for 6 days and after that immediately on june9 I got periods. At that time I was normal and now in July my period is due for 2 days .. Is it because of promolut n last month or can I really expect pregnancy.. Regards Anjana