No STD causes the symptoms you describe. Contrary to popular beliefs, hepatitis C virus (HCV) is rarely sexually transmitted. The only population group in which hep C can be considered an STD is in gay men -- and even there, sexual transmission is rare. (We do not test anyone for HCV in my STD clinic, unless they are injection drug users.) Non-injection drug use and large numbers of sex partners (among heterosexual men and women) simply are not risk factors for hepatitis C.
In any case, your symptoms really don't sound like hepatitis. When reviewing symptoms on websites, you cannot symply take a list that includes things like abdominal pain (whether or not on the right side) or dark urine, then assume a chance of that problem. Symptom lists cannot provide the nuance required; and almost always, it is combinations of symptoms, plus a plausible risk, that count. If your urine were dark brown, AND your eyes were yellow, AND you had abdominal pain along with nausea and perhaps fever, AND if you gave a history of a behavior that had some chance of transmitted HCV, then -- and only then -- I would consider viral hepatitis C as a good possibility.
In summary, you describe no symptoms that suggest hepatitis C, your partner was not at risk, you had an exposure to her that probably could not have transmitted the virus, and you have had a reliably negative blood test. Therefore, I agree with your doctor that you don't have hepatitis C and do not need further testing for it.
I hope this helps. Best wishes--- HHH, MD
That description, all by itself, is 100% proof against liver disease as the cause of darker colored urine. Dark urine due to liver disease cannot come and go. Variation of urine color between very pale to darker yellow is entirely normal and occurs in everybody, primarily due to the amount of fluid intake (more urine, lighter color, less urine, darker -- it's that simple).
To add, my urine was never coffee like dark, just a very dark tint of yellow. I have heard that someone's urine with hep. is like coffee or tea, but my urine is never consistently dark, just occassionally.