Take her temperature. If it's over 101, call you vet. Listen for stomach sounds. If you don't hear any, it could be a mild heat related gas colic. Again call vet. If it is heat related, take steps to alleviate the condition. Hose her down, legs first. Keep her in a shady area until the sun sets, and offer her as much water as she will drink. Quite honestly, unless your vet charges for phone calls, you have nothing to lose by calling.
You just have to see your distance...you don't have to like it.