I have no idea how I contracted HepC, not being a drug user or promiscuous. In fact, my experience is common. But in your case, not to worry: Get tested in a few months (not right away, as the test requires the formation of antibodies). If it is positive, today's treatments are short, easy, and amazingly successful.
Open wound ie fresh wet weeping not a superficial scratch. Only about 4% or less of the population has hep c with the number decreasing all the time as nor hep c is essentially curable in most cases. So your odds of randomly encountering someone with hep c is small. Add to that hep c is not easily transmitted it requires blood to blood contact. The most common methods of transmission is sharing IV drug needles or having a blood transfusion prior to 1990 when hep c antibody testing was developed and the blood supply secured.
No you didn’t have an open wound