I recently noticed one of my Guinea Pig's eyes are crusty and cloudy, her eye also looks red around it. She's eating and drinking normally, but today she was walking in her cage and she seemed really dizzy, she wasn't walking straight and she fell on her back and couldn't get up until I helped her and then she almost fell down again. I'm taking her to the vet on Saturday but in the meantime does anyone know what this could be? I'm really scared and I don't want her to be in pain