If you cannot afford ionic/colloidal silver, perhaps you should make a one time investment in a home generator so that you can make your own for pennies on the dollar. CureZone sponsor Utopia Silver has a generator combo with tester, meter and silver rods that produces really good ionic/colloidal silver which you can buy for little over $100 when you use the CZ discount code of LR001. It is ano frills unit and you have to stir it manually, but it produces a superior home product and costs about half as much or less as other quality home generators. As an added benefit, when you buy one of their generators you get a lifetime buy-one, get-one free offer on their superior commercial colloidal silver product, Advanced Colloidal Silver.
Lolite had a great suggestion about using oregeno and neem. Like colloidal silver, you can also rub oregano into your tooth and gum area to help clear up the infection. Colloidal silver in quantity can help remove what appears to be a candida like fungal condition too, especially when combined with a healthy diet, coconut oil and bentonite clay.
Forget the root canal - that could open up a whole other can of worms for your health. Get the tooth pulled and if you later wish and can afford it, get a false tooth replacemnt.