I had my last period from 17/02/18 to 21/02/18. I had unprotected sex in the very early hours of 25/02/18 and took the morning after pill the same day about 3pm. I haven't had another period yet. Took a pregnancy test last week and it was negative. I am under quite a bit of stress at the moment. Had to have my dog put down a few days ago and the day after a close friend of mine passed away unexpectedly. Am really hoping am not pregnant just stressed which is effecting my period, as it has done in the past