Should i be concerned if my bilirubin in my liver has been elevated slightly for the past 3 and a half months, what could it mean?

Maybe: If it is primarily conjugated bilirubin and this is your only abnormality, it's likely you have gilbert's non-disease and should forget about it. I take it your physician isn't worried; you shouldn't be either. You may get checked for hemolysis with a reticulocyte count. If you're taking some medication and this is new, you may have rx-induced cholestasis. Other possibilities exist.