I track my period monthly and my cycle usually lasts about 28-30 days. I had sex on day 21 of my cycle and we used a condom. The condom worked and we had no problems. My period is about 5 days late and I have taken 2 pregnancy tests (both negative). 1 test was taken 10 days after the risk/period 2 days late, and the 2nd test was taken 13 days after the risk/period 5 days late. I have been super stressed, could this make my period almost a week late?