Is my girlfriend pregnant?

we had sex two weks ago..she hasnt had her period yet...so far shes late about 3 days I dunno...I know a lot of things can affect your period please help

Yeah, probably. Girls don't generally miss their period for no reason. Unless she has changed her eating habits drastically over the past two weeks, she's probably pregnant.

The only way to be sure is to take a pregnancy test, but that still might not be accurate. I am almost 2 weeks late and I had sex last month but every test I take comes out negative. It really just depends on a lot of different things. Just tell her to take a test. If she is you better not leave her! and you better be there for her trough EVERYTHING because your the one who made that child and it needs a dad!

Just have your girlfriend take a pregnancy test, and find out.

But just because she's late for her period doesn't mean that she's pregnant.Like you said there's a lot of things that can mess with her period.
I'm almost ALWAYS late for my period. But I start it eventually. It's only been 3 days, I don't think you really have anything to worry about yet.

shes prob not and stressing over it might be the reason shes late, but you can always take a pregnancy test to make positive