Hey everyone...I could really use some help and advice right now. I have my leopard gecko Zilla, that I've had for about 5 years. Recently I noticed some swelling around where it's tail begins. It was only minor at first but after taking her out today it has become quite large and is quite solid and black. I've noticed it's tail has become quite skinny due to this and I'm kind of at a loss at what to do. Going to the vet I know should be top priority but money is somewhat tight right now. I don't like the idea of her being in pain and the idea of euthanizing makes me feel horrible but if its what has to be done then it's what has to be done I've attached a photo and believe me i know it looks horrible..any help or opinions would be greatly appreciated.