I'm sorry you are having financial issues, but NOT spaying her has now just brought 100 times the financial burden than spaying her would have. No matter where you live, there are free or reduced cost spay clinics available. Finances is too easy and excuse for not spaying her. Unfortunately you are learning this lesson the hard and expensive way. Hopefully she won't have complications but it sounds as if she already is. Instead of $200 surgery to spay her, this could run into the thousands and you might still lose her.