I had sex with my wife on 28th april 2019. I used condom but I think that condom may have worn off while we were in the act. We don't want baby right now. On 1st may she was on her period, this shows that she might not be pregnant, but still I want to be sure and avoid pregnancy anyhow. Still to be on a safer side, I gave her an unwanted 72 on 4th may. Then she took a pregnancy test on 13th may it was negative. But it is 6th june today. She is not on her period yet, i'm worried if she might be pregnant or when will she get her period?