i have 8 days missed periods.am i pragnant?

Hello, and thank you for sharing your question with the community.  I understand how worried you must be feeling and I'd love to give you some helpful information on the subject.

Since you had sex without protection it is possible for you to become pregnant even if your boyfriend did "pull out" before ejaculation. Missing your period could be a sign of pregnancy.  So I suggest you take a pregnancy test. 

If the test in negative you may have missed your period for other reasons such as stress, taking medications, illness, or hormonal imbalances to name a few.  If you continue to have irregular or missed periods you should talk to your doctor.

In the future, you may want to consider using a contraceptive of some kind if you are planning to continue have intercourse.  Birth control pills are easy to start with.  In addition to preventing ovulation (pregnancy) they also tend to keep your cycle regular.

The pain you have in your leg is not likely related to your late/missed period.  Although you did not give much information on that aspect, you should probably give it some attention yourself.

Let us know if you have any more questions.

Faith