Yes you can. It only takes a drop of sperm to get you pregnant. As others have said you typical ovulate around 14 days after the first day of your period.
Yep, Only one of his little guys has to be present to get pregnant, and you were within the normal ovulation period so its definatley possible.
Yes you can get pregnant. According to the American Pregnancy Association Website: Understanding Ovulation, most women ovulate anywhere between Day 11 - Day 21 of their cycle. So Yes it is possible to become pregnant. As far as him only ejaculating in you just a little, even the smallest amount can contain millions and even billions of sperm. You can even get pregnant for pre ***, which is why the "pull out method" is not a reliable source of birth control.
usually women ovulate anywhere between 10 and 16 days after there period so technically yes you could definitely get pregnant then. If he ejaculated inside even a little there is still a chance. Good luck =)