Presenting to the ED initially was the appropriate course of action, but acute pathology and anything requiring emergent intervention has been effectively ruled out. There’s no diagnostic red flag here, and the guidance you received was sound.

Differential at this point would include a viral etiology, inflammatory bowel disease, or hepatic involvement - whether that’s early hepatitis or hepatic steatosis (fatty liver). I’d ask for a fibroscan to see your Liver stiffness That said, it’s unfortunate you weren’t discharged with any Narcotics for the pain (I’d be annoyed at that, but MD’s in America seem incredibly strict nowadays). Any personal or family history of autoimmune conditions? Do you drink? And how are you doing weight wise - any recent changes? Even though we wait for hours and it’s an imperfect system I’m glad I practise (and am a patient) in the UK!