Can you become pregnant if you are not on birth control pills and did use a condom but he only penetrated the vagina 10 times?

If sperm or semen came in contact with your vagina, there is a possibility of pregnancy. This would depend on how much came in contact, what part of your cycle you were in, etc. Be on the look out for symptoms. You're symptoms of pregnancy include: missed period, fatigue, swollen and or tender breasts, mood swings, flu like symptoms, nausea, implantation bleeding (slightly different than a period) etc. Not all women will experience pregnancy symptoms so if you do suspect you might be pregnant, you should take a test rather than relying solely on symptoms. Not all women will experience a missed period during the first few weeks of pregnancy, so again, it is important to use other determinations of pregnancy other than symptoms. It is important for you to confirm your pregnancy as soon as possible to ensure the proper care and safety of you and your new baby. Most of these symptoms will start about two weeks after the first day of your missed period.

Here is a link to a website that will calculate the probability of your pregnancy: http://www.thepregnancytest.com/

14 days after intercourse is the most accurate date for determining pregnancy with a home pregnancy test.