I have missed my last two periods. My lmp was the 9th of Janurary. I had unprotected sex on the 22nd of jan. I am 27 years old and have always had fairly regular periods (approx 30 days cycle), never had problems. I have taken several different HPT's at different stages which were all negative. I have no other noticable symptoms apart from tiredness ( i am a final year student nurse so tiredness probably due to this). The other thing which I am worried about is i dipped my urine afew times this week and found ++ of leucocytes (nothing else in it). I am just worried that I could be pregnant despite my negative home tests and if the leucocytes are related? I also had positive pregnancy test last feb and had an abortion at 7 weeks. I know it is possible it is a hormone imbalance.