Patricia, if you are talking about Hep C treatment meds, it mainly depends on the genotype as to how long one must take the treatment meds. Once a person tests undetectable for Hep C while taking the treatment meds, they must still continue to take the treatment meds until the end of the pre-determined treatment schedule; typically 24 weeks for Geno 2 and 3 and 48 weeks for geno 1. Of course, if one does not get an undetectable test soon enough, treatment will be terminated early. There are a ton of variables here. As GFRY said, your question lacks a lot of information necessary to give you much of an answer.
what type of hep test are you talking about , if it's hcv antibody test and came up negative then you were never exposed to the virus and never was infected and no medication or no further move is required , if the test you are talking about is HCV PCR it is done after a positive HCV antibody test and if it is negative it means that your immune system took care of the virus and got rid of it ( spontaneous viral clearance ) , and also in this no medication is required , you need to ask your self some questions
1-when do you think you were infected??
2-how were you infected?
3-are you one of the people who work in jobs or in contact with people with hcv , because that makes you in risk of having it and in this case you need to do periodic testing for hcv antibodies every 6 month .
your post lacks so many informations we need to know more about these tests you had and its results.