How hot is the outside temp where you are, right now? Could she be too hot?
My cremello mare had colicy symptoms a few years ago, and I finally figured out she was too hot (I don't recall how warm it was outside, but it was summer). [i'm pretty sure I did call and talk to my vet, I don't recall all the details now, but figured she was overheating.] I hosed her down and walked her around in the shade, and she eventually came around.