What Causes Missed Periods After Taking Primolut-N?

hi.i am 28 years old women .i got married on 2nd june. 4 days before my marriage, i staretd to take a pill (PRIMOLUT-N) to avoid periods during my wedding,continued till 4th of june. i menstruated on 5th june.. we had intercourse several times with male protection after that. We travelled a lot in the last one month also. now i am experiencing no periods even if my periods date have crossed .pls advice wht could be the cause and what should i do?