how many days is your menstrual cycle..? take the length of days your menstrual cycle is, subtract 14.. and you should get a general idea of when in your schedule you ovulate. (for example.. 30 day menstrual cycle - 14 days = ovulated on day 16. then... whatever the answer to that equation is, add that many days starting at march 30th (so if youre schedule is 30 days... add 16 days to march 30th which would be april 15th) and that is your estimated conception date. if your period is irregular, this is harder to figure out. unless you just want to subtract 6 weeks 2 days from june 3rd and then you get a date of april 20th.

realistically, you slept with the 2 guys within the same week so it will almost be impossible to know who the father is until the baby is born and you do a paternity test.