In the same skillet over medium-high heat, saute the onion, celery, and bell pepper until soft, about 5 minutes. Add the garlic and cook for 1 more minute, stirring constantly. Add the water, diced tomatoes and their juices, sugar, Old Bay seasoning, and cayenne pepper. Bring to a boil; reduce the heat and simmer for 20 minutes. Stir in the shrimp and the cooked, crumbled bacon. Continue simmering until the shrimp turn pink and opaque, about 5-8 more minutes.