Gerbil epileptic seizure?

Hi, I need help quickly or something. It's 1:39 am right now and I'm desperate. I was just about to go to sleep and say goodnight to my two gerbils until I noticed that one of them wasn't well at all. She's sitting on the roof of a wooden house, stiff with her eyes half open and her body is very cold, but my room is actually quite warm. She goes to drink every two minutes and then she sits back down on the wooden roof and her right ear twitches slightly. Does anyone know what this could be?