I've Been Having High ALT Levels For A Couple Of

I've been having high ALT levels for a couple of months now. In April, it was around 180. In May, it was 127. I'm awaiting the results from June. I've also had slightly low iron levels (44). My symptoms include chronic fatigue, occasional fever, menstrual-like cramps, and frequent bowel movements. I am an 18 year old female and I delivered a baby 3 months ago (March 9th). My abdominal CT scan came back clear as well as my abdominal ultrasound. I'm scheduled to have a gallbladder function test even though it looked fine on the ultrasound. My question is, what could possibly be wrong with me that's not being detected?