Here is an article from MedHelp.org about Hep C transmission that also cites the CDC statistic of 3 weeks above. Hope this alleviates some of your concerns.
http://www.medhelp.org/hepatitis-c/articles/What-Is-Hepatitis-C/2251
Hi
You should be fine. However, if you are really stressing out about this, follow up with your doctor, which should alleviate all concerns.
Best wishes,
How long does the Hepatitis C virus survive outside the body?
The Hepatitis C virus can survive outside the body at room temperature, on environmental surfaces, for up to 3 weeks.
http://www.cdc.gov/hepatitis/hcv/cfaq.htm