Sometimes your local shelter will spay or neuter a dog if u cannot afford to do so, sometimes it's free and sometimes they do it for a reduced price. Also, u probably should consider re-homing the dog. U need to sit down and ask yourself if u are really giving the dog what's best. If she is still a puppy then he has a good chance of still being adopted if u were to surrender her to a shelter. Please think about what's best for the dog.