Dark urine is a classic symptom of hep B and C. Did you have sex with her or only use
drugs? Hep B is a classic Std, transmitted mainly through sexual activity.
Hep C is NOT considered a Std, transmitted mainly through blood transfusion before
1992 and drug use. A six month negative for hep B and C puts in the clear so i hope
that is how your test comes out.
From the U.S. CDC:
"How soon after exposure to HCV can anti-HCV be detected?
HCV infection can be detected by anti-HCV screening tests (enzyme immunoassay) 4–10 weeks after infection. Anti-HCV can be detected in >97% of persons by 6 months after exposure."
http://www.cdc.gov/hepatitis/HCV/HCVfaq.htm#section3
6 months is supposedly conclusive according to the CDC, you should also get tested for HIV as well.