What can cause teeth pain, loose tooth, and swollen gums?

Many causes: tooth abscesses, periodontal( gum) abscesses, are most common causes. There other less common causes but you need evaluation ASAP!

Toothache: Four reasons: 1. Tooth decay. 2. Gum disease. 3. Trauma. 4. Teeth grinding. Regardless, schedule an appointment to see your dentist, because the tooth pain will not go away without treatment.

Many causes: Get to a dentist for a thorough history and exam. I would do so asap. Could be an infection or other causes.