The only way to know if you have hepatitis C is to get tested. This can either be done with a blood test arranged by your healthcare provider or a finger prick test available at some clinics.
Where to get tested — Stick it to Hep C (external link)
The test is to see if you have hepatitis C antibodies. If this test is positive, it means you have been exposed to the hepatitis C virus sometime in your life. This may have been within the past few months or many years ago.
If you have a positive test, you will need another blood test to check if you currently have hepatitis C virus in your blood. You may also need further testing of your liver to check for damage. This may include a painless liver scan called a FibroScan.