You are still sticking with objectivism. Most objectivists defend themselves against Hume’s worry by rejecting the assumption that only what science can investigate is real.
For instance, they might argue that science investigates the physical world while insisting that we should not assume that all facts are physical. This is a consistent and defensible position. Nonetheless, it remains a challenge to objectivists to explain how we can acquire moral knowledge, if not through anything like scientific investigation.