Getting pregnant does not depend upon how many times your partner ejaculated inside you but, rather, when you had unprotected sex during your menstrual cycle. If he ejaculated inside you during the fertile days of your cycle, you have greater chances of conceiving. The fertile days are the days before and after ovulation, which occurs about 14 days before the next period comes. You'll need to know the average number of days in your menstrual cycle before you can estimate the date of ovulation. If your menstrual cycle averages 28 days and you had sex around the date of the question (12-31-06), then you would have ovulated around the 27th of December (approximately). You can always take a home pregnancy test to confirm or exclude pregnancy. The results are valid up to 5 days before an expected menstrual period.