Hi Welcome to health care magic...
HCV reactive means u are or were infected with Hepatitis C virus
AST & ALT being normal means its dormant , means its just lying silent in your liver, not damaging your liver for now.Consult a gastroenterologist
and find out if he would advice treatment.Usually when hepatic enzymes are normal , no treatment is requires but if the virus is active then treatment may be required.
U r not at risk of your life now.The complications can be - liver damage
), Hepatocellular cancer(liver cancer
) , these are possible complications , does not mean you will have them for sure , but u have a chance to have them.
Dont worry a lot , consult a gastroenterologist , get an advice , take treatment if he advices and take precautions not to spread it - dont donate blood .