Very slim chance of Hep C transfer from sex, 2% is what I have read also. I was told that if I was married and having sex with one partner I didn't need to use protection.
I was first diagnosed with Hep C in 1999, I underwent the old treatment with Pegasus Interferon and Ribavirn which was ineffective. In 2011 I cleared the virus with the new treatment.
I am well aware of the negative sides, the paranoia, and the sensitive nature of even having this condition. For a long time it bothered me how I contracted it, but at that point it's all moot, not worrying about something that you will never have the answer to. Recent studies have shown that a large part of the Hep C outbreak was caused by improper use of needles, blood transfusions and medical procedures not intravenous drug use. The new treatment is highly effective, and safe. All of my liver enzymes returned to normal readings within 12 weeks. Very limited side effects.