I got my period back around 2 month pp. I am now a little over 4 month pp. And my period is 8 days late. My husband and I had unprotected sex a day before I was suppose to start. My periods have been irregular, my last period was 3 days late. I took a few pregnancy tests all negative. I was so scared I was pregnant I took a emergency contraceptive 5 days later.

My question is: How long should I be waiting before I take another pregnancy test for it to accurate???