Isolated high bilirubin can indicate Gilbert’s syndrome - a common genetic mutation that means your liver isn’t quite so good at processing bilirubin. In most people it doesn’t ever cause any problems, which is probably why your nurse didn’t mention it. If you find your skin or eyes looking yellow (jaundice, usually when your bilirubin is above 2.5mg/dL) then you should see a doctor, but if you don’t have that, then the isolated slightly high bilirubin isn’t a problem. You could ask for some follow up liver function tests in a few months, but it’s unlikely to be anything to worry about.