No period for almost 2 months.

We had sex on 19th April, her period started on 14th April and ended on 18th april. The condome was torn but I didn't ejaculate at that time. For safety she took an i pill that day evening. After that no bleeding spotting nothing occurred. She missed her period on may, we did pregnancy test on 20th may, 25th may, 2nd june and 10th june, all with morning first urine sample and all of them are negative. She doesn't have any pregnancy symptoms either. But from 10th june she is getting period cramps. She had anemia related problems and had a history of irregular periods but after taking iron pill it was quite regular, so she stopped taking iron pills, after missing her period on may she started taking those pills still nothing happened. Today is 15th june, should I wait for a few days for her period to arrive or should I visit a doctor? Also is there any chance of pregnancy?