Well....at this point.....go to the doc with her. If she is pregnant you need to step up to the plate and do what you know you need to do as a man. As hard as it may be. Then when the baby is born, have the test, establish paternity and if it's yours....be the daddy. Every child deserves two parents that love and care for them. Not just $ but emotionally too. Doesn't mean you have to get married. Just means you need to be the dad.

I hope the best for you....and the baby.