You can use homeopathy as a complementary medicine to the Antibiotics /future root canal. I tend to use combination homeopathics because its so easy to find what you need but single remedies also work well if you find one that fits for you. Here are a couple ingredients in my King Bio Tooth & Gums remedy that you may want to try:
Hekla Lava: (Boericke’s) (Lava from Mt. Hecla) Marked action on the jaws. Great use for gum abscess. Relieves facial neuralgia from carious teeth and after extraction. Relieves toothache with swelling about jaws.
Calcarea Fluorica: (Boericke’s ) (Fluoride of Lime) Relieves hard swelling on the cheek with pain or toothache and hard swelling on jawbone. Prevents loosening of teeth with or without pain. Relieves toothache with pain if any food touches the tooth.
Magnesia Phosphorica: (Boericke’s) (Phosphate of Magnesia) Relieves toothaches and ulceration of teeth with swelling of glands of face.