Im trying to figure out when I conceived and who the father may be. My LMP was Sept 30-Oct 3. I slept with man A Oct. 5 and then slept with man B Oct.10 then slept with man A again Oct. 17,18,19. Went to the obgyn and was told that I was due 7/7/13 based on my last period. Then my doctor changed my due date to 7/12/13 based on my ultrasound. Any feed back would be great Thx!