Why is my Bilirubin so high?

I am a 27yr old woman who was admitted to the hospital with terrible pain in my lower left abdomen and lower back. Urine tests showed that I had severe haematuria and proteinuria but no leucocytes, so obviously no infection. They were fairly certain it was kidney stones so they performed a full blood count, abdominal ultrasound and abdominal CT. Both scans came back normal and the bloods were normal apart from showing a bilirubin count of 22. I was discharged but am still unable to eat properly due to nausea, I'm still in pain, my skin is still quite yellow and there is still visible signs of blood in my urine. What could this be?