I spent the first three years of my explorative years thinking I was pregnant
LOL, Liza.....I think many young girls think that, because they feel guilty, and realize they are probably not truly ready to be having sexual relations.
Why would your gf, java, not believe in a home pregnancy test? Is she worried about false results? I can tell you, most home pregnancy test are highly accurate, but if you truly want to know whether or not she is pregnant, than she should see a doctor and have a blood test.
If she is pregnant and intends on having the baby, then she needs to start pre-natal care, if she is to be responsible.
I agree with what someone else said (or someone's father) "If you are old enough to be playing around, then you should be old enough to accept consequences of your actions."