I've had sex about five times last month, and at least three times during my projected fertile window, one of which was on the day of my estimated ovulation. However, condoms were used at all times. There was one brief incident where there was penetration without a condom but he did not ejaculate and it was for about 30 seconds. My period this month is now five days late. Could I be pregnant even though we used a condom? I haven't been stressing about it until I was 3 days late so I don't know if stress could be a factor