What would you call me?

It is good to see someone thinking for him/her self. You are using a good method in evaluating the ideas. Are they self consistent? Will I be contradicting myself if I adopt this idea and try to act on it? While your method is sound you may want to expand your experience of how other people in philosophy and thought have used these ideas. In my experience nihilists do not make statements on belief as such, they simply declare that any value system derived from traditional sources are invalid. It tends to be a moral stand while agnostics in both flavors withhold judgment in the absence of evidence. For example, if I am an agnostic about Theism I would not necessarily reject Theistic morality since the evidence is not in. Are you simply a skeptic who thinks human knowledge is impossible?