Last year in on June 1, 2005, I met this new guy. We had intercourse on the 4th. On June 23, my urine pregnancy test was Positive. I do not remember getting a menstrual in June at all. I believe, but am not sure that my LMP was 5/5/2005. Now I have a little girl, who do not know her father and feel this new guy is the dad. When was my conception date? The sonogram was giving me 2 weeks over what my due date should be. I gave birth to my daughter Jan 31, 2006, my sonogram gave to due dates, 2/10/06 and 3/1/06. Which one is correct, is this man I'm claiming to be the father is he really her dad. Im so confused and yes I had two other partners also. I counted back the dates from the sono and it points toward this new guy. Is it posible for the urine pregnancy test to come back positive after 19 day after intercourse. I need to know so I wont claim the wrong guy for being the father of my daughter.