Fry the bacon, then drain it on paper towels. Pour off most of the bacon grease, leaving about 1 tablespoons in the pan (enough to saute the onion and peppers.) Put the garlic, onion, and peppers in the remaining grease and fry until translucent. Combine the cream cheese with the chicken, bacon, and cooked onion mixture. Mix until the cream cheese has melted or fully incorporated into the mix.
Spray a large casserole dish with Pam (or butter it or grease it lightly) to keep the tortillas from sticking. Alternately, you can pour a little of the enchilada sauce in the bottom. Put 4 tortillas on the bottom of the casserole. You want the bottom covered, so tear them into pieces so the entire bottom is covered. Put 1/2 of the chicken mixture on top of the tortillas. Layer another 4 tortillas on top, tearing to fit as before. Put the remaining chicken mixture on top and cover it with the remaining tortillas, tearing to fit as before. Pour the enchilada sauce over all. Top with the shredded cheese. Bake about 30 minute at 350F or until the center has puffed a little and is lightly browned.