Lizzy's Creamy Chicken Terragon Soup

1/2 pound Chicken
2 tsp Salt
1/2 tsp pepper
2 TBS vegetable oil
3 TBS butter
1 medium onion diced
3 celery stalks diced
1 TBS garlic
1/2 tsp terragon
1/2 tsp oregano
2 tsp. paprika
1/2 Cup + 2 TBS Flour
8 cups chicken broth
1 can petite diced tomatoes or diced fresh
3/4 Cup Heavy Cream
Fresh spinich to garnish