I also hve stomach ache and leg ache can these symptoms show I'm pregrant?

If what touches? Are you asking about semen? Only if semen comes in contact with the vagina is there a possibility of pregnancy.

Those pains can be signs, normally the first sign is you miss your period after having sex. You do know what sex is ?

Sex - Wikipedia, the free encyclopedia (http://en.wikipedia.org/wiki/Sex)