I agree a vet call or visit may be in order. My cat Leonardo, has allergies that always start with his eyes watering and nose running. His vet did some tests to rule out feline leukemia and stuff. He had the feline leukemia shot when I first got him but had a bad reaction to it and almost died so I won't let them give it to him any more. He's an indoor only cat. Leonardo now has an anithistimine he takes when ever his allergies act up. Even doing that he once in a while needs an antibiotic. Hope your sweetie gets to feeling better soon.