Hope, I was only answering your question, the title of the thread: "What should I do?" If you don't want opinions, don't ask for them.

I think you already have your mind set on the puppy since you get upset when anyone suggests using the money for your doctor. Why not then just get the puppy? I still have my opinion that it doesn't sound like you can afford a puppy, and it sounds like you really need to see your doctor. But if you think otherwise, that's your choice.