I really feel you on this, it can be so nerve-wracking when your little one has to go through any kind of scan and then you are watching every single diaper change after that. My girl had some liver-related checks done when she was a baby and I remember being so anxious about the same thing. I have not personally done the HIDA scan specifically, but hopefully another mum here has and can share what they noticed lah. Hang in there, you are doing a great job keeping such a close eye on your LO.