I have gallstones. im 18, weighs 44kg nd i don't eat much fatty foods. my dad had gallstones and i was on brth cntrl pill. which caused my gallstones?

Hard to know.: Both your family history and bcp use could have contributed to gallstone formation--it's hard to know which was more important. Regardless, you are joining a very large group of people who have gallstones. More important than the stones is whether they are causing any pain--"silent" gallstones require no further treatment.

Several potential: Cholestrin bilirubin hemoglobinopathies! sickle cell probably some more that hers will add!