One of my kittens has a mysterious lump on her tummy, it is located where her imbelica cord would have been. The lump is about the size of the tip of my pinkie and it is not hard, it is soft and mushy. She acts perfectly fine, eats and drinks and plays hard. Should I be concerned? This kitten ispart of a strays littler that I have taken in so I am very hesitant to take her to the vet because of finances. Thanks