Very very weird regurg situation...

[Crowfingers]

This may be an obvious question, but did you see which end the regurg came out of? I ask because I once saw one of my BP's acting exactly as you described - flailing around, opening her mouth, looking generally very distressed - and it ended up being before a huge poop.

Mine has done the same. He'd gone nearly 3 months without a stool or a shed, then I heard this crazy wet slap and weird grunting noises. Mashadar was standing up tall, mouth open and gagging, tail raised and what I can only describe as farting...about 5 min of straining and he passed a lot of stool - 30 grams to be exact -. He went back to normal after, other than a tiny bit of blood at the edge of his vent.

No real solutions for the color change, just keep an eye on her. Hopfully she was just a little backed up