In your crockpot, stir together the tomatoes, cream of mushroom soup, water or chicken broth, garlic, onion, bell pepper, mushrooms, poblano or jalapeno, and 2 tablespoons of Cajun seasoning.
Top with the chicken breasts and sprinkle with additional Cajun seasoning.
Cook on low for 68 hours or on high for 4 hours.
Start cooking the spaghetti during the last 20 minutes of crockpot cooking time.
Remove the chicken from the crockpot and place it on a cutting board. Turn the crockpot to low and add the cream cheese.
Chop the chicken into bitesize pieces and add back to the crockpot along with the cooked spaghetti and cheddar cheese.
Turn the crockpot to warm. Fold everything together until well mixed.
Serve and enjoy!