I had the first day of my last period on the 2nd of January. Had Unprotected Sex on the 26th of January, took levonelle on the 27th. It has now been seven days since taking the EC and I have had no bleeding but I am experiencing signs of early pregnancy symptoms. However, I took Levonelle within the first 24 hours and was not ovulating during the unprotected intercourse. Why am I experiencing such nauseating symptoms, constipation, dizziness and fatigue and what is the longest one should wait for their next period? I have been pregnant before and feel pregnant again but surely the chances are minimal? Surely I can t be experiencing such strong signs of pregnancy a week after intercourse?